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What is a significant cause of Influenze like illness among healthy adolescents and adults presenting for medical evaluation?

Therefore, our cases are not representative of HCoV infection in the community, where individuals with mild, self-limiting illness due to HCoV opt not to seek medical care for the management of their ILI. In summary, we have shown that HCoV is a significant cause of ILI among otherwise healthy adolescents and adults presenting for medical evaluation. Although there were differences in species distribution by age group, we did not detect any differences between species with respect to the clinical spectrum of disease.

The strengths of this study of HCoV in otherwise healthy adolescents and adults include its multisite and multiyear design, the use of a multiplex diagnostic panel, the prospective collection of symptom data, and the use of a symptom severity scale similar to what has been employed previously. 15 One important limitation of this study was our selective recruitment of individuals who had presented to a healthcare facility for care of an ILI. Therefore, our cases are not representative of HCoV infection in the community, where individuals with mild, self-limiting illness due to HCoV opt not to seek medical care for the management of their ILI.

What is a significant cause of Influenze like illness among healthy adolescents and adults presenting for medical evaluation?

Therefore, our cases are not representative of HCoV infection in the community, where individuals with mild, self-limiting illness due to HCoV opt not to seek medical care for the management of their ILI. In summary, we have shown that HCoV is a significant cause of ILI among otherwise healthy adolescents and adults presenting for medical evaluation. Although there were differences in species distribution by age group, we did not detect any differences between species with respect to the clinical spectrum of disease.

6, 7, [10] [11] [12] In two of these studies, a significant proportion of the study population had underlying medical conditions. 6, 7 Herein, we describe, among a cohort of otherwise healthy adolescents and adults with influenza-like illness (ILI), the species-specific prevalence and severity of symptoms associated with HCoV infection. 13 Patients 0-65 years of age and presenting for care <72 hours after onset of ILI symptoms were recruited for study participation.

What is a significant cause of Influenze like illness among healthy adolescents and adults presenting for medical evaluation?

Therefore, our cases are not representative of HCoV infection in the community, where individuals with mild, self-limiting illness due to HCoV opt not to seek medical care for the management of their ILI. In summary, we have shown that HCoV is a significant cause of ILI among otherwise healthy adolescents and adults presenting for medical evaluation. Although there were differences in species distribution by age group, we did not detect any differences between species with respect to the clinical spectrum of disease.

Both inpatient and outpatient subjects were eligible to participate. Patients with underlying medical conditions (eg, diabetes, chronic obstructive pulmonary disease, severe asthma), women with a high-risk or complicated pregnancy, and patients with a poorly controlled psychiatric disorder were excluded. Information on patient demographics and presence/severity of symptoms at the time of enrollment was collected by in-person interview.

What is a significant cause of Influenze like illness among healthy adolescents and adults presenting for medical evaluation?

Therefore, our cases are not representative of HCoV infection in the community, where individuals with mild, self-limiting illness due to HCoV opt not to seek medical care for the management of their ILI. In summary, we have shown that HCoV is a significant cause of ILI among otherwise healthy adolescents and adults presenting for medical evaluation. Although there were differences in species distribution by age group, we did not detect any differences between species with respect to the clinical spectrum of disease.

Symptom severity was rated on an ordinal scale from 0 (none) to 3 (severe). Symptom severity scores were quantified using the following five measures: (i) individual symptom score for 20 symptoms, (ii) the upper respiratory symptom score, calculated as the sum of severity scores for earache, runny nose, sore throat, and sneezing, (iii) the lower respiratory symptom score, calculated as the sum of severity scores for cough, difficulty breathing, hoarseness, and chest discomfort, (iv) the gastrointestinal symptom score, calculated as the sum of severity scores for diarrhea, vomiting, anorexia, nausea, and (Table 1) . There was season-to-season variability in the leading causes of The findings of our study, conducted over a 5-year period at five geographically dispersed sites in the USA, demonstrate that human coronavirus (HCoV) is an important cause of influenza-like illness (ILI) ranged from 4% to 22%.

What is a significant cause of Influenze like illness among healthy adolescents and adults presenting for medical evaluation?

Therefore, our cases are not representative of HCoV infection in the community, where individuals with mild, self-limiting illness due to HCoV opt not to seek medical care for the management of their ILI. In summary, we have shown that HCoV is a significant cause of ILI among otherwise healthy adolescents and adults presenting for medical evaluation. Although there were differences in species distribution by age group, we did not detect any differences between species with respect to the clinical spectrum of disease.

13 Patients 0-65 years of age and presenting for care <72 hours after onset of ILI symptoms were recruited for study participation. ILI was defined as a temperature ≥100.4°F and sore throat or one of the following respiratory symptoms: cough, sputum production, shortness of breath, or chest pain. Both inpatient and outpatient subjects were eligible to participate.

What is a significant cause of Influenze like illness among healthy adolescents and adults presenting for medical evaluation?

Therefore, our cases are not representative of HCoV infection in the community, where individuals with mild, self-limiting illness due to HCoV opt not to seek medical care for the management of their ILI. In summary, we have shown that HCoV is a significant cause of ILI among otherwise healthy adolescents and adults presenting for medical evaluation. Although there were differences in species distribution by age group, we did not detect any differences between species with respect to the clinical spectrum of disease.

There was season-to-season variability in the leading causes of The findings of our study, conducted over a 5-year period at five geographically dispersed sites in the USA, demonstrate that human coronavirus (HCoV) is an important cause of influenza-like illness (ILI) ranged from 4% to 22%. [8] [9] [10] [11] 14 Additionally, we found HCoV-OC43 to be the most common species among adults, as has been reported elsewhere. 8, 9, 11, 12, 14 HCoV-OC43 and HCoV-229E were the most common strains in alternate seasons, reflecting a season-to-season variability of HCoV strain circulation that has been reported in other multiyear studies.

What is a significant cause of Influenze like illness among healthy adolescents and adults presenting for medical evaluation?

Therefore, our cases are not representative of HCoV infection in the community, where individuals with mild, self-limiting illness due to HCoV opt not to seek medical care for the management of their ILI. In summary, we have shown that HCoV is a significant cause of ILI among otherwise healthy adolescents and adults presenting for medical evaluation. Although there were differences in species distribution by age group, we did not detect any differences between species with respect to the clinical spectrum of disease.

8, 9, 11, 12, 14 HCoV-OC43 and HCoV-229E were the most common strains in alternate seasons, reflecting a season-to-season variability of HCoV strain circulation that has been reported in other multiyear studies. 4 8 The mechanisms by which this particular species elicits these symptoms are not known. The strengths of this study of HCoV in otherwise healthy adolescents and adults include its multisite and multiyear design, the use of a multiplex diagnostic panel, the prospective collection of symptom data, and the use of a symptom severity scale similar to what has been employed previously.

What is a significant cause of Influenze like illness among healthy adolescents and adults presenting for medical evaluation?

Therefore, our cases are not representative of HCoV infection in the community, where individuals with mild, self-limiting illness due to HCoV opt not to seek medical care for the management of their ILI. In summary, we have shown that HCoV is a significant cause of ILI among otherwise healthy adolescents and adults presenting for medical evaluation. Although there were differences in species distribution by age group, we did not detect any differences between species with respect to the clinical spectrum of disease.

Human coronavirus (HCoV) is a known cause of influenza‐like illness (ILI). In a multisite, observational, longitudinal study of ILI among otherwise healthy adolescents and adults, 12% of subjects were PCR‐positive for HCoV. The distribution of species was as follows: HCoV‐OC43 (34%), HCoV‐229E (28%), HCoV‐NL63 (22%), and HCoV‐HKU1 (16%).

What is a significant cause of Influenze like illness among healthy adolescents and adults presenting for medical evaluation?

Therefore, our cases are not representative of HCoV infection in the community, where individuals with mild, self-limiting illness due to HCoV opt not to seek medical care for the management of their ILI. In summary, we have shown that HCoV is a significant cause of ILI among otherwise healthy adolescents and adults presenting for medical evaluation. Although there were differences in species distribution by age group, we did not detect any differences between species with respect to the clinical spectrum of disease.

Information on patient demographics and presence/severity of symptoms at the time of enrollment was collected by in-person interview. Participants were then instructed on the use of a daily diary to record the presence/severity of symptoms for 7 days following initial symptom onset. Symptom severity was rated on an ordinal scale from 0 (none) to 3 (severe).

What is a significant cause of Influenze like illness among healthy adolescents and adults presenting for medical evaluation?

Therefore, our cases are not representative of HCoV infection in the community, where individuals with mild, self-limiting illness due to HCoV opt not to seek medical care for the management of their ILI. In summary, we have shown that HCoV is a significant cause of ILI among otherwise healthy adolescents and adults presenting for medical evaluation. Although there were differences in species distribution by age group, we did not detect any differences between species with respect to the clinical spectrum of disease.

Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate. Highly virulent species of HCoV were responsible for outbreaks of severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS); case-fatality rates ranged from 14% to 45%. [1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI).

What is a significant cause of Influenze like illness among healthy adolescents and adults presenting for medical evaluation?

Therefore, our cases are not representative of HCoV infection in the community, where individuals with mild, self-limiting illness due to HCoV opt not to seek medical care for the management of their ILI. In summary, we have shown that HCoV is a significant cause of ILI among otherwise healthy adolescents and adults presenting for medical evaluation. Although there were differences in species distribution by age group, we did not detect any differences between species with respect to the clinical spectrum of disease.

[1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI). [4] [5] [6] [7] [8] [9] [10] [11] Five previous studies have described the species-specific clinical characteristics of HCoV infection among adults. 6, 7, [10] [11] [12] In two of these studies, a significant proportion of the study population had underlying medical conditions.

What is a significant cause of Influenze like illness among healthy adolescents and adults presenting for medical evaluation?

Therefore, our cases are not representative of HCoV infection in the community, where individuals with mild, self-limiting illness due to HCoV opt not to seek medical care for the management of their ILI. In summary, we have shown that HCoV is a significant cause of ILI among otherwise healthy adolescents and adults presenting for medical evaluation. Although there were differences in species distribution by age group, we did not detect any differences between species with respect to the clinical spectrum of disease.

The distribution of species was as follows: HCoV‐OC43 (34%), HCoV‐229E (28%), HCoV‐NL63 (22%), and HCoV‐HKU1 (16%). We did not observe species‐specific differences in the clinical characteristics of HCoV infection, with the exception of HCoV‐HKU1, for which the severity of gastrointestinal symptoms trended higher on the fourth day of illness. Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate.

What is the most common species of Human Coronavirus among adults?

8, 9, 11, 12, 14 HCoV-OC43 and HCoV-229E were the most common strains in alternate seasons, reflecting a season-to-season variability of HCoV strain circulation that has been reported in other multiyear studies. 4 8 The mechanisms by which this particular species elicits these symptoms are not known. The strengths of this study of HCoV in otherwise healthy adolescents and adults include its multisite and multiyear design, the use of a multiplex diagnostic panel, the prospective collection of symptom data, and the use of a symptom severity scale similar to what has been employed previously.

Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate. Highly virulent species of HCoV were responsible for outbreaks of severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS); case-fatality rates ranged from 14% to 45%. [1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI).

What is the most common species of Human Coronavirus among adults?

8, 9, 11, 12, 14 HCoV-OC43 and HCoV-229E were the most common strains in alternate seasons, reflecting a season-to-season variability of HCoV strain circulation that has been reported in other multiyear studies. 4 8 The mechanisms by which this particular species elicits these symptoms are not known. The strengths of this study of HCoV in otherwise healthy adolescents and adults include its multisite and multiyear design, the use of a multiplex diagnostic panel, the prospective collection of symptom data, and the use of a symptom severity scale similar to what has been employed previously.

There was season-to-season variability in the leading causes of The findings of our study, conducted over a 5-year period at five geographically dispersed sites in the USA, demonstrate that human coronavirus (HCoV) is an important cause of influenza-like illness (ILI) ranged from 4% to 22%. [8] [9] [10] [11] 14 Additionally, we found HCoV-OC43 to be the most common species among adults, as has been reported elsewhere. 8, 9, 11, 12, 14 HCoV-OC43 and HCoV-229E were the most common strains in alternate seasons, reflecting a season-to-season variability of HCoV strain circulation that has been reported in other multiyear studies.

What is the most common species of Human Coronavirus among adults?

8, 9, 11, 12, 14 HCoV-OC43 and HCoV-229E were the most common strains in alternate seasons, reflecting a season-to-season variability of HCoV strain circulation that has been reported in other multiyear studies. 4 8 The mechanisms by which this particular species elicits these symptoms are not known. The strengths of this study of HCoV in otherwise healthy adolescents and adults include its multisite and multiyear design, the use of a multiplex diagnostic panel, the prospective collection of symptom data, and the use of a symptom severity scale similar to what has been employed previously.

The distribution of species was as follows: HCoV‐OC43 (34%), HCoV‐229E (28%), HCoV‐NL63 (22%), and HCoV‐HKU1 (16%). We did not observe species‐specific differences in the clinical characteristics of HCoV infection, with the exception of HCoV‐HKU1, for which the severity of gastrointestinal symptoms trended higher on the fourth day of illness. Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate.

What is the most common species of Human Coronavirus among adults?

8, 9, 11, 12, 14 HCoV-OC43 and HCoV-229E were the most common strains in alternate seasons, reflecting a season-to-season variability of HCoV strain circulation that has been reported in other multiyear studies. 4 8 The mechanisms by which this particular species elicits these symptoms are not known. The strengths of this study of HCoV in otherwise healthy adolescents and adults include its multisite and multiyear design, the use of a multiplex diagnostic panel, the prospective collection of symptom data, and the use of a symptom severity scale similar to what has been employed previously.

Human coronavirus (HCoV) is a known cause of influenza‐like illness (ILI). In a multisite, observational, longitudinal study of ILI among otherwise healthy adolescents and adults, 12% of subjects were PCR‐positive for HCoV. The distribution of species was as follows: HCoV‐OC43 (34%), HCoV‐229E (28%), HCoV‐NL63 (22%), and HCoV‐HKU1 (16%).

What is the most common species of Human Coronavirus among adults?

8, 9, 11, 12, 14 HCoV-OC43 and HCoV-229E were the most common strains in alternate seasons, reflecting a season-to-season variability of HCoV strain circulation that has been reported in other multiyear studies. 4 8 The mechanisms by which this particular species elicits these symptoms are not known. The strengths of this study of HCoV in otherwise healthy adolescents and adults include its multisite and multiyear design, the use of a multiplex diagnostic panel, the prospective collection of symptom data, and the use of a symptom severity scale similar to what has been employed previously.

[1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI). [4] [5] [6] [7] [8] [9] [10] [11] Five previous studies have described the species-specific clinical characteristics of HCoV infection among adults. 6, 7, [10] [11] [12] In two of these studies, a significant proportion of the study population had underlying medical conditions.

What is the most common species of Human Coronavirus among adults?

8, 9, 11, 12, 14 HCoV-OC43 and HCoV-229E were the most common strains in alternate seasons, reflecting a season-to-season variability of HCoV strain circulation that has been reported in other multiyear studies. 4 8 The mechanisms by which this particular species elicits these symptoms are not known. The strengths of this study of HCoV in otherwise healthy adolescents and adults include its multisite and multiyear design, the use of a multiplex diagnostic panel, the prospective collection of symptom data, and the use of a symptom severity scale similar to what has been employed previously.

6, 7, [10] [11] [12] In two of these studies, a significant proportion of the study population had underlying medical conditions. 6, 7 Herein, we describe, among a cohort of otherwise healthy adolescents and adults with influenza-like illness (ILI), the species-specific prevalence and severity of symptoms associated with HCoV infection. 13 Patients 0-65 years of age and presenting for care <72 hours after onset of ILI symptoms were recruited for study participation.

What is the most common species of Human Coronavirus among adults?

8, 9, 11, 12, 14 HCoV-OC43 and HCoV-229E were the most common strains in alternate seasons, reflecting a season-to-season variability of HCoV strain circulation that has been reported in other multiyear studies. 4 8 The mechanisms by which this particular species elicits these symptoms are not known. The strengths of this study of HCoV in otherwise healthy adolescents and adults include its multisite and multiyear design, the use of a multiplex diagnostic panel, the prospective collection of symptom data, and the use of a symptom severity scale similar to what has been employed previously.

Therefore, our cases are not representative of HCoV infection in the community, where individuals with mild, self-limiting illness due to HCoV opt not to seek medical care for the management of their ILI. In summary, we have shown that HCoV is a significant cause of ILI among otherwise healthy adolescents and adults presenting for medical evaluation. Although there were differences in species distribution by age group, we did not detect any differences between species with respect to the clinical spectrum of disease.

What is the most common species of Human Coronavirus among adults?

8, 9, 11, 12, 14 HCoV-OC43 and HCoV-229E were the most common strains in alternate seasons, reflecting a season-to-season variability of HCoV strain circulation that has been reported in other multiyear studies. 4 8 The mechanisms by which this particular species elicits these symptoms are not known. The strengths of this study of HCoV in otherwise healthy adolescents and adults include its multisite and multiyear design, the use of a multiplex diagnostic panel, the prospective collection of symptom data, and the use of a symptom severity scale similar to what has been employed previously.

Symptom severity was rated on an ordinal scale from 0 (none) to 3 (severe). Symptom severity scores were quantified using the following five measures: (i) individual symptom score for 20 symptoms, (ii) the upper respiratory symptom score, calculated as the sum of severity scores for earache, runny nose, sore throat, and sneezing, (iii) the lower respiratory symptom score, calculated as the sum of severity scores for cough, difficulty breathing, hoarseness, and chest discomfort, (iv) the gastrointestinal symptom score, calculated as the sum of severity scores for diarrhea, vomiting, anorexia, nausea, and (Table 1) . There was season-to-season variability in the leading causes of The findings of our study, conducted over a 5-year period at five geographically dispersed sites in the USA, demonstrate that human coronavirus (HCoV) is an important cause of influenza-like illness (ILI) ranged from 4% to 22%.

What is the most common species of Human Coronavirus among adults?

8, 9, 11, 12, 14 HCoV-OC43 and HCoV-229E were the most common strains in alternate seasons, reflecting a season-to-season variability of HCoV strain circulation that has been reported in other multiyear studies. 4 8 The mechanisms by which this particular species elicits these symptoms are not known. The strengths of this study of HCoV in otherwise healthy adolescents and adults include its multisite and multiyear design, the use of a multiplex diagnostic panel, the prospective collection of symptom data, and the use of a symptom severity scale similar to what has been employed previously.

The strengths of this study of HCoV in otherwise healthy adolescents and adults include its multisite and multiyear design, the use of a multiplex diagnostic panel, the prospective collection of symptom data, and the use of a symptom severity scale similar to what has been employed previously. 15 One important limitation of this study was our selective recruitment of individuals who had presented to a healthcare facility for care of an ILI. Therefore, our cases are not representative of HCoV infection in the community, where individuals with mild, self-limiting illness due to HCoV opt not to seek medical care for the management of their ILI.

What is the most common species of Human Coronavirus among adults?

8, 9, 11, 12, 14 HCoV-OC43 and HCoV-229E were the most common strains in alternate seasons, reflecting a season-to-season variability of HCoV strain circulation that has been reported in other multiyear studies. 4 8 The mechanisms by which this particular species elicits these symptoms are not known. The strengths of this study of HCoV in otherwise healthy adolescents and adults include its multisite and multiyear design, the use of a multiplex diagnostic panel, the prospective collection of symptom data, and the use of a symptom severity scale similar to what has been employed previously.

13 Patients 0-65 years of age and presenting for care <72 hours after onset of ILI symptoms were recruited for study participation. ILI was defined as a temperature ≥100.4°F and sore throat or one of the following respiratory symptoms: cough, sputum production, shortness of breath, or chest pain. Both inpatient and outpatient subjects were eligible to participate.

What is the most common species of Human Coronavirus among adults?

8, 9, 11, 12, 14 HCoV-OC43 and HCoV-229E were the most common strains in alternate seasons, reflecting a season-to-season variability of HCoV strain circulation that has been reported in other multiyear studies. 4 8 The mechanisms by which this particular species elicits these symptoms are not known. The strengths of this study of HCoV in otherwise healthy adolescents and adults include its multisite and multiyear design, the use of a multiplex diagnostic panel, the prospective collection of symptom data, and the use of a symptom severity scale similar to what has been employed previously.

Both inpatient and outpatient subjects were eligible to participate. Patients with underlying medical conditions (eg, diabetes, chronic obstructive pulmonary disease, severe asthma), women with a high-risk or complicated pregnancy, and patients with a poorly controlled psychiatric disorder were excluded. Information on patient demographics and presence/severity of symptoms at the time of enrollment was collected by in-person interview.

What is the most common species of Human Coronavirus among adults?

8, 9, 11, 12, 14 HCoV-OC43 and HCoV-229E were the most common strains in alternate seasons, reflecting a season-to-season variability of HCoV strain circulation that has been reported in other multiyear studies. 4 8 The mechanisms by which this particular species elicits these symptoms are not known. The strengths of this study of HCoV in otherwise healthy adolescents and adults include its multisite and multiyear design, the use of a multiplex diagnostic panel, the prospective collection of symptom data, and the use of a symptom severity scale similar to what has been employed previously.

Information on patient demographics and presence/severity of symptoms at the time of enrollment was collected by in-person interview. Participants were then instructed on the use of a daily diary to record the presence/severity of symptoms for 7 days following initial symptom onset. Symptom severity was rated on an ordinal scale from 0 (none) to 3 (severe).

Which Human Coronavirus showed species specific clinical characteristics of its infection?

The distribution of species was as follows: HCoV‐OC43 (34%), HCoV‐229E (28%), HCoV‐NL63 (22%), and HCoV‐HKU1 (16%). We did not observe species‐specific differences in the clinical characteristics of HCoV infection, with the exception of HCoV‐HKU1, for which the severity of gastrointestinal symptoms trended higher on the fourth day of illness. Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate.

Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate. Highly virulent species of HCoV were responsible for outbreaks of severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS); case-fatality rates ranged from 14% to 45%. [1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI).

Which Human Coronavirus showed species specific clinical characteristics of its infection?

The distribution of species was as follows: HCoV‐OC43 (34%), HCoV‐229E (28%), HCoV‐NL63 (22%), and HCoV‐HKU1 (16%). We did not observe species‐specific differences in the clinical characteristics of HCoV infection, with the exception of HCoV‐HKU1, for which the severity of gastrointestinal symptoms trended higher on the fourth day of illness. Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate.

[1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI). [4] [5] [6] [7] [8] [9] [10] [11] Five previous studies have described the species-specific clinical characteristics of HCoV infection among adults. 6, 7, [10] [11] [12] In two of these studies, a significant proportion of the study population had underlying medical conditions.

Which Human Coronavirus showed species specific clinical characteristics of its infection?

The distribution of species was as follows: HCoV‐OC43 (34%), HCoV‐229E (28%), HCoV‐NL63 (22%), and HCoV‐HKU1 (16%). We did not observe species‐specific differences in the clinical characteristics of HCoV infection, with the exception of HCoV‐HKU1, for which the severity of gastrointestinal symptoms trended higher on the fourth day of illness. Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate.

Human coronavirus (HCoV) is a known cause of influenza‐like illness (ILI). In a multisite, observational, longitudinal study of ILI among otherwise healthy adolescents and adults, 12% of subjects were PCR‐positive for HCoV. The distribution of species was as follows: HCoV‐OC43 (34%), HCoV‐229E (28%), HCoV‐NL63 (22%), and HCoV‐HKU1 (16%).

Which Human Coronavirus showed species specific clinical characteristics of its infection?

The distribution of species was as follows: HCoV‐OC43 (34%), HCoV‐229E (28%), HCoV‐NL63 (22%), and HCoV‐HKU1 (16%). We did not observe species‐specific differences in the clinical characteristics of HCoV infection, with the exception of HCoV‐HKU1, for which the severity of gastrointestinal symptoms trended higher on the fourth day of illness. Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate.

6, 7, [10] [11] [12] In two of these studies, a significant proportion of the study population had underlying medical conditions. 6, 7 Herein, we describe, among a cohort of otherwise healthy adolescents and adults with influenza-like illness (ILI), the species-specific prevalence and severity of symptoms associated with HCoV infection. 13 Patients 0-65 years of age and presenting for care <72 hours after onset of ILI symptoms were recruited for study participation.

Which Human Coronavirus showed species specific clinical characteristics of its infection?

The distribution of species was as follows: HCoV‐OC43 (34%), HCoV‐229E (28%), HCoV‐NL63 (22%), and HCoV‐HKU1 (16%). We did not observe species‐specific differences in the clinical characteristics of HCoV infection, with the exception of HCoV‐HKU1, for which the severity of gastrointestinal symptoms trended higher on the fourth day of illness. Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate.

There was season-to-season variability in the leading causes of The findings of our study, conducted over a 5-year period at five geographically dispersed sites in the USA, demonstrate that human coronavirus (HCoV) is an important cause of influenza-like illness (ILI) ranged from 4% to 22%. [8] [9] [10] [11] 14 Additionally, we found HCoV-OC43 to be the most common species among adults, as has been reported elsewhere. 8, 9, 11, 12, 14 HCoV-OC43 and HCoV-229E were the most common strains in alternate seasons, reflecting a season-to-season variability of HCoV strain circulation that has been reported in other multiyear studies.

Which Human Coronavirus showed species specific clinical characteristics of its infection?

The distribution of species was as follows: HCoV‐OC43 (34%), HCoV‐229E (28%), HCoV‐NL63 (22%), and HCoV‐HKU1 (16%). We did not observe species‐specific differences in the clinical characteristics of HCoV infection, with the exception of HCoV‐HKU1, for which the severity of gastrointestinal symptoms trended higher on the fourth day of illness. Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate.

Therefore, our cases are not representative of HCoV infection in the community, where individuals with mild, self-limiting illness due to HCoV opt not to seek medical care for the management of their ILI. In summary, we have shown that HCoV is a significant cause of ILI among otherwise healthy adolescents and adults presenting for medical evaluation. Although there were differences in species distribution by age group, we did not detect any differences between species with respect to the clinical spectrum of disease.

Which Human Coronavirus showed species specific clinical characteristics of its infection?

The distribution of species was as follows: HCoV‐OC43 (34%), HCoV‐229E (28%), HCoV‐NL63 (22%), and HCoV‐HKU1 (16%). We did not observe species‐specific differences in the clinical characteristics of HCoV infection, with the exception of HCoV‐HKU1, for which the severity of gastrointestinal symptoms trended higher on the fourth day of illness. Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate.

8, 9, 11, 12, 14 HCoV-OC43 and HCoV-229E were the most common strains in alternate seasons, reflecting a season-to-season variability of HCoV strain circulation that has been reported in other multiyear studies. 4 8 The mechanisms by which this particular species elicits these symptoms are not known. The strengths of this study of HCoV in otherwise healthy adolescents and adults include its multisite and multiyear design, the use of a multiplex diagnostic panel, the prospective collection of symptom data, and the use of a symptom severity scale similar to what has been employed previously.

Which Human Coronavirus showed species specific clinical characteristics of its infection?

The distribution of species was as follows: HCoV‐OC43 (34%), HCoV‐229E (28%), HCoV‐NL63 (22%), and HCoV‐HKU1 (16%). We did not observe species‐specific differences in the clinical characteristics of HCoV infection, with the exception of HCoV‐HKU1, for which the severity of gastrointestinal symptoms trended higher on the fourth day of illness. Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate.

Symptom severity was rated on an ordinal scale from 0 (none) to 3 (severe). Symptom severity scores were quantified using the following five measures: (i) individual symptom score for 20 symptoms, (ii) the upper respiratory symptom score, calculated as the sum of severity scores for earache, runny nose, sore throat, and sneezing, (iii) the lower respiratory symptom score, calculated as the sum of severity scores for cough, difficulty breathing, hoarseness, and chest discomfort, (iv) the gastrointestinal symptom score, calculated as the sum of severity scores for diarrhea, vomiting, anorexia, nausea, and (Table 1) . There was season-to-season variability in the leading causes of The findings of our study, conducted over a 5-year period at five geographically dispersed sites in the USA, demonstrate that human coronavirus (HCoV) is an important cause of influenza-like illness (ILI) ranged from 4% to 22%.

Which Human Coronavirus showed species specific clinical characteristics of its infection?

The distribution of species was as follows: HCoV‐OC43 (34%), HCoV‐229E (28%), HCoV‐NL63 (22%), and HCoV‐HKU1 (16%). We did not observe species‐specific differences in the clinical characteristics of HCoV infection, with the exception of HCoV‐HKU1, for which the severity of gastrointestinal symptoms trended higher on the fourth day of illness. Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate.

The strengths of this study of HCoV in otherwise healthy adolescents and adults include its multisite and multiyear design, the use of a multiplex diagnostic panel, the prospective collection of symptom data, and the use of a symptom severity scale similar to what has been employed previously. 15 One important limitation of this study was our selective recruitment of individuals who had presented to a healthcare facility for care of an ILI. Therefore, our cases are not representative of HCoV infection in the community, where individuals with mild, self-limiting illness due to HCoV opt not to seek medical care for the management of their ILI.

Which Human Coronavirus showed species specific clinical characteristics of its infection?

The distribution of species was as follows: HCoV‐OC43 (34%), HCoV‐229E (28%), HCoV‐NL63 (22%), and HCoV‐HKU1 (16%). We did not observe species‐specific differences in the clinical characteristics of HCoV infection, with the exception of HCoV‐HKU1, for which the severity of gastrointestinal symptoms trended higher on the fourth day of illness. Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate.

13 Patients 0-65 years of age and presenting for care <72 hours after onset of ILI symptoms were recruited for study participation. ILI was defined as a temperature ≥100.4°F and sore throat or one of the following respiratory symptoms: cough, sputum production, shortness of breath, or chest pain. Both inpatient and outpatient subjects were eligible to participate.

Which Human Coronavirus showed species specific clinical characteristics of its infection?

The distribution of species was as follows: HCoV‐OC43 (34%), HCoV‐229E (28%), HCoV‐NL63 (22%), and HCoV‐HKU1 (16%). We did not observe species‐specific differences in the clinical characteristics of HCoV infection, with the exception of HCoV‐HKU1, for which the severity of gastrointestinal symptoms trended higher on the fourth day of illness. Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate.

Information on patient demographics and presence/severity of symptoms at the time of enrollment was collected by in-person interview. Participants were then instructed on the use of a daily diary to record the presence/severity of symptoms for 7 days following initial symptom onset. Symptom severity was rated on an ordinal scale from 0 (none) to 3 (severe).

Which Human Coronavirus showed species specific clinical characteristics of its infection?

The distribution of species was as follows: HCoV‐OC43 (34%), HCoV‐229E (28%), HCoV‐NL63 (22%), and HCoV‐HKU1 (16%). We did not observe species‐specific differences in the clinical characteristics of HCoV infection, with the exception of HCoV‐HKU1, for which the severity of gastrointestinal symptoms trended higher on the fourth day of illness. Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate.

Both inpatient and outpatient subjects were eligible to participate. Patients with underlying medical conditions (eg, diabetes, chronic obstructive pulmonary disease, severe asthma), women with a high-risk or complicated pregnancy, and patients with a poorly controlled psychiatric disorder were excluded. Information on patient demographics and presence/severity of symptoms at the time of enrollment was collected by in-person interview.

What causes the outbreak of SARS and MERS.

Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate. Highly virulent species of HCoV were responsible for outbreaks of severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS); case-fatality rates ranged from 14% to 45%. [1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI).

There was season-to-season variability in the leading causes of The findings of our study, conducted over a 5-year period at five geographically dispersed sites in the USA, demonstrate that human coronavirus (HCoV) is an important cause of influenza-like illness (ILI) ranged from 4% to 22%. [8] [9] [10] [11] 14 Additionally, we found HCoV-OC43 to be the most common species among adults, as has been reported elsewhere. 8, 9, 11, 12, 14 HCoV-OC43 and HCoV-229E were the most common strains in alternate seasons, reflecting a season-to-season variability of HCoV strain circulation that has been reported in other multiyear studies.

What causes the outbreak of SARS and MERS.

Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate. Highly virulent species of HCoV were responsible for outbreaks of severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS); case-fatality rates ranged from 14% to 45%. [1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI).

Human coronavirus (HCoV) is a known cause of influenza‐like illness (ILI). In a multisite, observational, longitudinal study of ILI among otherwise healthy adolescents and adults, 12% of subjects were PCR‐positive for HCoV. The distribution of species was as follows: HCoV‐OC43 (34%), HCoV‐229E (28%), HCoV‐NL63 (22%), and HCoV‐HKU1 (16%).

What causes the outbreak of SARS and MERS.

Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate. Highly virulent species of HCoV were responsible for outbreaks of severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS); case-fatality rates ranged from 14% to 45%. [1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI).

Symptom severity was rated on an ordinal scale from 0 (none) to 3 (severe). Symptom severity scores were quantified using the following five measures: (i) individual symptom score for 20 symptoms, (ii) the upper respiratory symptom score, calculated as the sum of severity scores for earache, runny nose, sore throat, and sneezing, (iii) the lower respiratory symptom score, calculated as the sum of severity scores for cough, difficulty breathing, hoarseness, and chest discomfort, (iv) the gastrointestinal symptom score, calculated as the sum of severity scores for diarrhea, vomiting, anorexia, nausea, and (Table 1) . There was season-to-season variability in the leading causes of The findings of our study, conducted over a 5-year period at five geographically dispersed sites in the USA, demonstrate that human coronavirus (HCoV) is an important cause of influenza-like illness (ILI) ranged from 4% to 22%.

What causes the outbreak of SARS and MERS.

Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate. Highly virulent species of HCoV were responsible for outbreaks of severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS); case-fatality rates ranged from 14% to 45%. [1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI).

[1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI). [4] [5] [6] [7] [8] [9] [10] [11] Five previous studies have described the species-specific clinical characteristics of HCoV infection among adults. 6, 7, [10] [11] [12] In two of these studies, a significant proportion of the study population had underlying medical conditions.

What causes the outbreak of SARS and MERS.

Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate. Highly virulent species of HCoV were responsible for outbreaks of severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS); case-fatality rates ranged from 14% to 45%. [1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI).

Therefore, our cases are not representative of HCoV infection in the community, where individuals with mild, self-limiting illness due to HCoV opt not to seek medical care for the management of their ILI. In summary, we have shown that HCoV is a significant cause of ILI among otherwise healthy adolescents and adults presenting for medical evaluation. Although there were differences in species distribution by age group, we did not detect any differences between species with respect to the clinical spectrum of disease.

What causes the outbreak of SARS and MERS.

Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate. Highly virulent species of HCoV were responsible for outbreaks of severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS); case-fatality rates ranged from 14% to 45%. [1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI).

The distribution of species was as follows: HCoV‐OC43 (34%), HCoV‐229E (28%), HCoV‐NL63 (22%), and HCoV‐HKU1 (16%). We did not observe species‐specific differences in the clinical characteristics of HCoV infection, with the exception of HCoV‐HKU1, for which the severity of gastrointestinal symptoms trended higher on the fourth day of illness. Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate.

What causes the outbreak of SARS and MERS.

Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate. Highly virulent species of HCoV were responsible for outbreaks of severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS); case-fatality rates ranged from 14% to 45%. [1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI).

6, 7, [10] [11] [12] In two of these studies, a significant proportion of the study population had underlying medical conditions. 6, 7 Herein, we describe, among a cohort of otherwise healthy adolescents and adults with influenza-like illness (ILI), the species-specific prevalence and severity of symptoms associated with HCoV infection. 13 Patients 0-65 years of age and presenting for care <72 hours after onset of ILI symptoms were recruited for study participation.

What causes the outbreak of SARS and MERS.

Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate. Highly virulent species of HCoV were responsible for outbreaks of severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS); case-fatality rates ranged from 14% to 45%. [1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI).

8, 9, 11, 12, 14 HCoV-OC43 and HCoV-229E were the most common strains in alternate seasons, reflecting a season-to-season variability of HCoV strain circulation that has been reported in other multiyear studies. 4 8 The mechanisms by which this particular species elicits these symptoms are not known. The strengths of this study of HCoV in otherwise healthy adolescents and adults include its multisite and multiyear design, the use of a multiplex diagnostic panel, the prospective collection of symptom data, and the use of a symptom severity scale similar to what has been employed previously.

What causes the outbreak of SARS and MERS.

Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate. Highly virulent species of HCoV were responsible for outbreaks of severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS); case-fatality rates ranged from 14% to 45%. [1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI).

The strengths of this study of HCoV in otherwise healthy adolescents and adults include its multisite and multiyear design, the use of a multiplex diagnostic panel, the prospective collection of symptom data, and the use of a symptom severity scale similar to what has been employed previously. 15 One important limitation of this study was our selective recruitment of individuals who had presented to a healthcare facility for care of an ILI. Therefore, our cases are not representative of HCoV infection in the community, where individuals with mild, self-limiting illness due to HCoV opt not to seek medical care for the management of their ILI.

What causes the outbreak of SARS and MERS.

Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate. Highly virulent species of HCoV were responsible for outbreaks of severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS); case-fatality rates ranged from 14% to 45%. [1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI).

13 Patients 0-65 years of age and presenting for care <72 hours after onset of ILI symptoms were recruited for study participation. ILI was defined as a temperature ≥100.4°F and sore throat or one of the following respiratory symptoms: cough, sputum production, shortness of breath, or chest pain. Both inpatient and outpatient subjects were eligible to participate.

What causes the outbreak of SARS and MERS.

Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate. Highly virulent species of HCoV were responsible for outbreaks of severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS); case-fatality rates ranged from 14% to 45%. [1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI).

Both inpatient and outpatient subjects were eligible to participate. Patients with underlying medical conditions (eg, diabetes, chronic obstructive pulmonary disease, severe asthma), women with a high-risk or complicated pregnancy, and patients with a poorly controlled psychiatric disorder were excluded. Information on patient demographics and presence/severity of symptoms at the time of enrollment was collected by in-person interview.

What causes the outbreak of SARS and MERS.

Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate. Highly virulent species of HCoV were responsible for outbreaks of severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS); case-fatality rates ranged from 14% to 45%. [1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI).

Information on patient demographics and presence/severity of symptoms at the time of enrollment was collected by in-person interview. Participants were then instructed on the use of a daily diary to record the presence/severity of symptoms for 7 days following initial symptom onset. Symptom severity was rated on an ordinal scale from 0 (none) to 3 (severe).

What is the case fatality rate of SARS and MERS?

Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate. Highly virulent species of HCoV were responsible for outbreaks of severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS); case-fatality rates ranged from 14% to 45%. [1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI).

The distribution of species was as follows: HCoV‐OC43 (34%), HCoV‐229E (28%), HCoV‐NL63 (22%), and HCoV‐HKU1 (16%). We did not observe species‐specific differences in the clinical characteristics of HCoV infection, with the exception of HCoV‐HKU1, for which the severity of gastrointestinal symptoms trended higher on the fourth day of illness. Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate.

What is the case fatality rate of SARS and MERS?

Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate. Highly virulent species of HCoV were responsible for outbreaks of severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS); case-fatality rates ranged from 14% to 45%. [1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI).

Symptom severity was rated on an ordinal scale from 0 (none) to 3 (severe). Symptom severity scores were quantified using the following five measures: (i) individual symptom score for 20 symptoms, (ii) the upper respiratory symptom score, calculated as the sum of severity scores for earache, runny nose, sore throat, and sneezing, (iii) the lower respiratory symptom score, calculated as the sum of severity scores for cough, difficulty breathing, hoarseness, and chest discomfort, (iv) the gastrointestinal symptom score, calculated as the sum of severity scores for diarrhea, vomiting, anorexia, nausea, and (Table 1) . There was season-to-season variability in the leading causes of The findings of our study, conducted over a 5-year period at five geographically dispersed sites in the USA, demonstrate that human coronavirus (HCoV) is an important cause of influenza-like illness (ILI) ranged from 4% to 22%.

What is the case fatality rate of SARS and MERS?

Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate. Highly virulent species of HCoV were responsible for outbreaks of severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS); case-fatality rates ranged from 14% to 45%. [1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI).

Information on patient demographics and presence/severity of symptoms at the time of enrollment was collected by in-person interview. Participants were then instructed on the use of a daily diary to record the presence/severity of symptoms for 7 days following initial symptom onset. Symptom severity was rated on an ordinal scale from 0 (none) to 3 (severe).

What is the case fatality rate of SARS and MERS?

Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate. Highly virulent species of HCoV were responsible for outbreaks of severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS); case-fatality rates ranged from 14% to 45%. [1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI).

Human coronavirus (HCoV) is a known cause of influenza‐like illness (ILI). In a multisite, observational, longitudinal study of ILI among otherwise healthy adolescents and adults, 12% of subjects were PCR‐positive for HCoV. The distribution of species was as follows: HCoV‐OC43 (34%), HCoV‐229E (28%), HCoV‐NL63 (22%), and HCoV‐HKU1 (16%).

What is the case fatality rate of SARS and MERS?

Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate. Highly virulent species of HCoV were responsible for outbreaks of severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS); case-fatality rates ranged from 14% to 45%. [1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI).

There was season-to-season variability in the leading causes of The findings of our study, conducted over a 5-year period at five geographically dispersed sites in the USA, demonstrate that human coronavirus (HCoV) is an important cause of influenza-like illness (ILI) ranged from 4% to 22%. [8] [9] [10] [11] 14 Additionally, we found HCoV-OC43 to be the most common species among adults, as has been reported elsewhere. 8, 9, 11, 12, 14 HCoV-OC43 and HCoV-229E were the most common strains in alternate seasons, reflecting a season-to-season variability of HCoV strain circulation that has been reported in other multiyear studies.

What is the case fatality rate of SARS and MERS?

Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate. Highly virulent species of HCoV were responsible for outbreaks of severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS); case-fatality rates ranged from 14% to 45%. [1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI).

6, 7, [10] [11] [12] In two of these studies, a significant proportion of the study population had underlying medical conditions. 6, 7 Herein, we describe, among a cohort of otherwise healthy adolescents and adults with influenza-like illness (ILI), the species-specific prevalence and severity of symptoms associated with HCoV infection. 13 Patients 0-65 years of age and presenting for care <72 hours after onset of ILI symptoms were recruited for study participation.

What is the case fatality rate of SARS and MERS?

Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate. Highly virulent species of HCoV were responsible for outbreaks of severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS); case-fatality rates ranged from 14% to 45%. [1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI).

[1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI). [4] [5] [6] [7] [8] [9] [10] [11] Five previous studies have described the species-specific clinical characteristics of HCoV infection among adults. 6, 7, [10] [11] [12] In two of these studies, a significant proportion of the study population had underlying medical conditions.

What is the case fatality rate of SARS and MERS?

Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate. Highly virulent species of HCoV were responsible for outbreaks of severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS); case-fatality rates ranged from 14% to 45%. [1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI).

13 Patients 0-65 years of age and presenting for care <72 hours after onset of ILI symptoms were recruited for study participation. ILI was defined as a temperature ≥100.4°F and sore throat or one of the following respiratory symptoms: cough, sputum production, shortness of breath, or chest pain. Both inpatient and outpatient subjects were eligible to participate.

What is the case fatality rate of SARS and MERS?

Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate. Highly virulent species of HCoV were responsible for outbreaks of severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS); case-fatality rates ranged from 14% to 45%. [1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI).

8, 9, 11, 12, 14 HCoV-OC43 and HCoV-229E were the most common strains in alternate seasons, reflecting a season-to-season variability of HCoV strain circulation that has been reported in other multiyear studies. 4 8 The mechanisms by which this particular species elicits these symptoms are not known. The strengths of this study of HCoV in otherwise healthy adolescents and adults include its multisite and multiyear design, the use of a multiplex diagnostic panel, the prospective collection of symptom data, and the use of a symptom severity scale similar to what has been employed previously.

What is the case fatality rate of SARS and MERS?

Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate. Highly virulent species of HCoV were responsible for outbreaks of severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS); case-fatality rates ranged from 14% to 45%. [1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI).

Therefore, our cases are not representative of HCoV infection in the community, where individuals with mild, self-limiting illness due to HCoV opt not to seek medical care for the management of their ILI. In summary, we have shown that HCoV is a significant cause of ILI among otherwise healthy adolescents and adults presenting for medical evaluation. Although there were differences in species distribution by age group, we did not detect any differences between species with respect to the clinical spectrum of disease.

What is the case fatality rate of SARS and MERS?

Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate. Highly virulent species of HCoV were responsible for outbreaks of severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS); case-fatality rates ranged from 14% to 45%. [1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI).

Both inpatient and outpatient subjects were eligible to participate. Patients with underlying medical conditions (eg, diabetes, chronic obstructive pulmonary disease, severe asthma), women with a high-risk or complicated pregnancy, and patients with a poorly controlled psychiatric disorder were excluded. Information on patient demographics and presence/severity of symptoms at the time of enrollment was collected by in-person interview.

What is the case fatality rate of SARS and MERS?

Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate. Highly virulent species of HCoV were responsible for outbreaks of severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS); case-fatality rates ranged from 14% to 45%. [1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI).

The strengths of this study of HCoV in otherwise healthy adolescents and adults include its multisite and multiyear design, the use of a multiplex diagnostic panel, the prospective collection of symptom data, and the use of a symptom severity scale similar to what has been employed previously. 15 One important limitation of this study was our selective recruitment of individuals who had presented to a healthcare facility for care of an ILI. Therefore, our cases are not representative of HCoV infection in the community, where individuals with mild, self-limiting illness due to HCoV opt not to seek medical care for the management of their ILI.

What were the common HCOV strains in the 5 year USA study?

8, 9, 11, 12, 14 HCoV-OC43 and HCoV-229E were the most common strains in alternate seasons, reflecting a season-to-season variability of HCoV strain circulation that has been reported in other multiyear studies. 4 8 The mechanisms by which this particular species elicits these symptoms are not known. The strengths of this study of HCoV in otherwise healthy adolescents and adults include its multisite and multiyear design, the use of a multiplex diagnostic panel, the prospective collection of symptom data, and the use of a symptom severity scale similar to what has been employed previously.

There was season-to-season variability in the leading causes of The findings of our study, conducted over a 5-year period at five geographically dispersed sites in the USA, demonstrate that human coronavirus (HCoV) is an important cause of influenza-like illness (ILI) ranged from 4% to 22%. [8] [9] [10] [11] 14 Additionally, we found HCoV-OC43 to be the most common species among adults, as has been reported elsewhere. 8, 9, 11, 12, 14 HCoV-OC43 and HCoV-229E were the most common strains in alternate seasons, reflecting a season-to-season variability of HCoV strain circulation that has been reported in other multiyear studies.

What were the common HCOV strains in the 5 year USA study?

8, 9, 11, 12, 14 HCoV-OC43 and HCoV-229E were the most common strains in alternate seasons, reflecting a season-to-season variability of HCoV strain circulation that has been reported in other multiyear studies. 4 8 The mechanisms by which this particular species elicits these symptoms are not known. The strengths of this study of HCoV in otherwise healthy adolescents and adults include its multisite and multiyear design, the use of a multiplex diagnostic panel, the prospective collection of symptom data, and the use of a symptom severity scale similar to what has been employed previously.

6, 7, [10] [11] [12] In two of these studies, a significant proportion of the study population had underlying medical conditions. 6, 7 Herein, we describe, among a cohort of otherwise healthy adolescents and adults with influenza-like illness (ILI), the species-specific prevalence and severity of symptoms associated with HCoV infection. 13 Patients 0-65 years of age and presenting for care <72 hours after onset of ILI symptoms were recruited for study participation.

What were the common HCOV strains in the 5 year USA study?

8, 9, 11, 12, 14 HCoV-OC43 and HCoV-229E were the most common strains in alternate seasons, reflecting a season-to-season variability of HCoV strain circulation that has been reported in other multiyear studies. 4 8 The mechanisms by which this particular species elicits these symptoms are not known. The strengths of this study of HCoV in otherwise healthy adolescents and adults include its multisite and multiyear design, the use of a multiplex diagnostic panel, the prospective collection of symptom data, and the use of a symptom severity scale similar to what has been employed previously.

[1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI). [4] [5] [6] [7] [8] [9] [10] [11] Five previous studies have described the species-specific clinical characteristics of HCoV infection among adults. 6, 7, [10] [11] [12] In two of these studies, a significant proportion of the study population had underlying medical conditions.

What were the common HCOV strains in the 5 year USA study?

8, 9, 11, 12, 14 HCoV-OC43 and HCoV-229E were the most common strains in alternate seasons, reflecting a season-to-season variability of HCoV strain circulation that has been reported in other multiyear studies. 4 8 The mechanisms by which this particular species elicits these symptoms are not known. The strengths of this study of HCoV in otherwise healthy adolescents and adults include its multisite and multiyear design, the use of a multiplex diagnostic panel, the prospective collection of symptom data, and the use of a symptom severity scale similar to what has been employed previously.

Human coronavirus (HCoV) is a known cause of influenza‐like illness (ILI). In a multisite, observational, longitudinal study of ILI among otherwise healthy adolescents and adults, 12% of subjects were PCR‐positive for HCoV. The distribution of species was as follows: HCoV‐OC43 (34%), HCoV‐229E (28%), HCoV‐NL63 (22%), and HCoV‐HKU1 (16%).

What were the common HCOV strains in the 5 year USA study?

8, 9, 11, 12, 14 HCoV-OC43 and HCoV-229E were the most common strains in alternate seasons, reflecting a season-to-season variability of HCoV strain circulation that has been reported in other multiyear studies. 4 8 The mechanisms by which this particular species elicits these symptoms are not known. The strengths of this study of HCoV in otherwise healthy adolescents and adults include its multisite and multiyear design, the use of a multiplex diagnostic panel, the prospective collection of symptom data, and the use of a symptom severity scale similar to what has been employed previously.

The strengths of this study of HCoV in otherwise healthy adolescents and adults include its multisite and multiyear design, the use of a multiplex diagnostic panel, the prospective collection of symptom data, and the use of a symptom severity scale similar to what has been employed previously. 15 One important limitation of this study was our selective recruitment of individuals who had presented to a healthcare facility for care of an ILI. Therefore, our cases are not representative of HCoV infection in the community, where individuals with mild, self-limiting illness due to HCoV opt not to seek medical care for the management of their ILI.

What were the common HCOV strains in the 5 year USA study?

8, 9, 11, 12, 14 HCoV-OC43 and HCoV-229E were the most common strains in alternate seasons, reflecting a season-to-season variability of HCoV strain circulation that has been reported in other multiyear studies. 4 8 The mechanisms by which this particular species elicits these symptoms are not known. The strengths of this study of HCoV in otherwise healthy adolescents and adults include its multisite and multiyear design, the use of a multiplex diagnostic panel, the prospective collection of symptom data, and the use of a symptom severity scale similar to what has been employed previously.

Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate. Highly virulent species of HCoV were responsible for outbreaks of severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS); case-fatality rates ranged from 14% to 45%. [1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI).

What were the common HCOV strains in the 5 year USA study?

8, 9, 11, 12, 14 HCoV-OC43 and HCoV-229E were the most common strains in alternate seasons, reflecting a season-to-season variability of HCoV strain circulation that has been reported in other multiyear studies. 4 8 The mechanisms by which this particular species elicits these symptoms are not known. The strengths of this study of HCoV in otherwise healthy adolescents and adults include its multisite and multiyear design, the use of a multiplex diagnostic panel, the prospective collection of symptom data, and the use of a symptom severity scale similar to what has been employed previously.

The distribution of species was as follows: HCoV‐OC43 (34%), HCoV‐229E (28%), HCoV‐NL63 (22%), and HCoV‐HKU1 (16%). We did not observe species‐specific differences in the clinical characteristics of HCoV infection, with the exception of HCoV‐HKU1, for which the severity of gastrointestinal symptoms trended higher on the fourth day of illness. Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate.

What were the common HCOV strains in the 5 year USA study?

8, 9, 11, 12, 14 HCoV-OC43 and HCoV-229E were the most common strains in alternate seasons, reflecting a season-to-season variability of HCoV strain circulation that has been reported in other multiyear studies. 4 8 The mechanisms by which this particular species elicits these symptoms are not known. The strengths of this study of HCoV in otherwise healthy adolescents and adults include its multisite and multiyear design, the use of a multiplex diagnostic panel, the prospective collection of symptom data, and the use of a symptom severity scale similar to what has been employed previously.

Symptom severity was rated on an ordinal scale from 0 (none) to 3 (severe). Symptom severity scores were quantified using the following five measures: (i) individual symptom score for 20 symptoms, (ii) the upper respiratory symptom score, calculated as the sum of severity scores for earache, runny nose, sore throat, and sneezing, (iii) the lower respiratory symptom score, calculated as the sum of severity scores for cough, difficulty breathing, hoarseness, and chest discomfort, (iv) the gastrointestinal symptom score, calculated as the sum of severity scores for diarrhea, vomiting, anorexia, nausea, and (Table 1) . There was season-to-season variability in the leading causes of The findings of our study, conducted over a 5-year period at five geographically dispersed sites in the USA, demonstrate that human coronavirus (HCoV) is an important cause of influenza-like illness (ILI) ranged from 4% to 22%.

What were the common HCOV strains in the 5 year USA study?

8, 9, 11, 12, 14 HCoV-OC43 and HCoV-229E were the most common strains in alternate seasons, reflecting a season-to-season variability of HCoV strain circulation that has been reported in other multiyear studies. 4 8 The mechanisms by which this particular species elicits these symptoms are not known. The strengths of this study of HCoV in otherwise healthy adolescents and adults include its multisite and multiyear design, the use of a multiplex diagnostic panel, the prospective collection of symptom data, and the use of a symptom severity scale similar to what has been employed previously.

Therefore, our cases are not representative of HCoV infection in the community, where individuals with mild, self-limiting illness due to HCoV opt not to seek medical care for the management of their ILI. In summary, we have shown that HCoV is a significant cause of ILI among otherwise healthy adolescents and adults presenting for medical evaluation. Although there were differences in species distribution by age group, we did not detect any differences between species with respect to the clinical spectrum of disease.

What were the common HCOV strains in the 5 year USA study?

8, 9, 11, 12, 14 HCoV-OC43 and HCoV-229E were the most common strains in alternate seasons, reflecting a season-to-season variability of HCoV strain circulation that has been reported in other multiyear studies. 4 8 The mechanisms by which this particular species elicits these symptoms are not known. The strengths of this study of HCoV in otherwise healthy adolescents and adults include its multisite and multiyear design, the use of a multiplex diagnostic panel, the prospective collection of symptom data, and the use of a symptom severity scale similar to what has been employed previously.

13 Patients 0-65 years of age and presenting for care <72 hours after onset of ILI symptoms were recruited for study participation. ILI was defined as a temperature ≥100.4°F and sore throat or one of the following respiratory symptoms: cough, sputum production, shortness of breath, or chest pain. Both inpatient and outpatient subjects were eligible to participate.

What were the common HCOV strains in the 5 year USA study?

8, 9, 11, 12, 14 HCoV-OC43 and HCoV-229E were the most common strains in alternate seasons, reflecting a season-to-season variability of HCoV strain circulation that has been reported in other multiyear studies. 4 8 The mechanisms by which this particular species elicits these symptoms are not known. The strengths of this study of HCoV in otherwise healthy adolescents and adults include its multisite and multiyear design, the use of a multiplex diagnostic panel, the prospective collection of symptom data, and the use of a symptom severity scale similar to what has been employed previously.

Information on patient demographics and presence/severity of symptoms at the time of enrollment was collected by in-person interview. Participants were then instructed on the use of a daily diary to record the presence/severity of symptoms for 7 days following initial symptom onset. Symptom severity was rated on an ordinal scale from 0 (none) to 3 (severe).

What were the common HCOV strains in the 5 year USA study?

8, 9, 11, 12, 14 HCoV-OC43 and HCoV-229E were the most common strains in alternate seasons, reflecting a season-to-season variability of HCoV strain circulation that has been reported in other multiyear studies. 4 8 The mechanisms by which this particular species elicits these symptoms are not known. The strengths of this study of HCoV in otherwise healthy adolescents and adults include its multisite and multiyear design, the use of a multiplex diagnostic panel, the prospective collection of symptom data, and the use of a symptom severity scale similar to what has been employed previously.

Both inpatient and outpatient subjects were eligible to participate. Patients with underlying medical conditions (eg, diabetes, chronic obstructive pulmonary disease, severe asthma), women with a high-risk or complicated pregnancy, and patients with a poorly controlled psychiatric disorder were excluded. Information on patient demographics and presence/severity of symptoms at the time of enrollment was collected by in-person interview.

Which species are more prevalent but less severe?

[1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI). [4] [5] [6] [7] [8] [9] [10] [11] Five previous studies have described the species-specific clinical characteristics of HCoV infection among adults. 6, 7, [10] [11] [12] In two of these studies, a significant proportion of the study population had underlying medical conditions.

The distribution of species was as follows: HCoV‐OC43 (34%), HCoV‐229E (28%), HCoV‐NL63 (22%), and HCoV‐HKU1 (16%). We did not observe species‐specific differences in the clinical characteristics of HCoV infection, with the exception of HCoV‐HKU1, for which the severity of gastrointestinal symptoms trended higher on the fourth day of illness. Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate.

Which species are more prevalent but less severe?

[1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI). [4] [5] [6] [7] [8] [9] [10] [11] Five previous studies have described the species-specific clinical characteristics of HCoV infection among adults. 6, 7, [10] [11] [12] In two of these studies, a significant proportion of the study population had underlying medical conditions.

Text: Clinical manifestations of human coronavirus (HCoV) infection range from a mild, self-limiting illness of the upper respiratory tract to an acute respiratory distress syndrome with a high mortality rate. Highly virulent species of HCoV were responsible for outbreaks of severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS); case-fatality rates ranged from 14% to 45%. [1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI).

Which species are more prevalent but less severe?

[1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI). [4] [5] [6] [7] [8] [9] [10] [11] Five previous studies have described the species-specific clinical characteristics of HCoV infection among adults. 6, 7, [10] [11] [12] In two of these studies, a significant proportion of the study population had underlying medical conditions.

8, 9, 11, 12, 14 HCoV-OC43 and HCoV-229E were the most common strains in alternate seasons, reflecting a season-to-season variability of HCoV strain circulation that has been reported in other multiyear studies. 4 8 The mechanisms by which this particular species elicits these symptoms are not known. The strengths of this study of HCoV in otherwise healthy adolescents and adults include its multisite and multiyear design, the use of a multiplex diagnostic panel, the prospective collection of symptom data, and the use of a symptom severity scale similar to what has been employed previously.

Which species are more prevalent but less severe?

[1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI). [4] [5] [6] [7] [8] [9] [10] [11] Five previous studies have described the species-specific clinical characteristics of HCoV infection among adults. 6, 7, [10] [11] [12] In two of these studies, a significant proportion of the study population had underlying medical conditions.

Therefore, our cases are not representative of HCoV infection in the community, where individuals with mild, self-limiting illness due to HCoV opt not to seek medical care for the management of their ILI. In summary, we have shown that HCoV is a significant cause of ILI among otherwise healthy adolescents and adults presenting for medical evaluation. Although there were differences in species distribution by age group, we did not detect any differences between species with respect to the clinical spectrum of disease.

Which species are more prevalent but less severe?

[1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI). [4] [5] [6] [7] [8] [9] [10] [11] Five previous studies have described the species-specific clinical characteristics of HCoV infection among adults. 6, 7, [10] [11] [12] In two of these studies, a significant proportion of the study population had underlying medical conditions.

There was season-to-season variability in the leading causes of The findings of our study, conducted over a 5-year period at five geographically dispersed sites in the USA, demonstrate that human coronavirus (HCoV) is an important cause of influenza-like illness (ILI) ranged from 4% to 22%. [8] [9] [10] [11] 14 Additionally, we found HCoV-OC43 to be the most common species among adults, as has been reported elsewhere. 8, 9, 11, 12, 14 HCoV-OC43 and HCoV-229E were the most common strains in alternate seasons, reflecting a season-to-season variability of HCoV strain circulation that has been reported in other multiyear studies.

Which species are more prevalent but less severe?

[1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI). [4] [5] [6] [7] [8] [9] [10] [11] Five previous studies have described the species-specific clinical characteristics of HCoV infection among adults. 6, 7, [10] [11] [12] In two of these studies, a significant proportion of the study population had underlying medical conditions.

6, 7, [10] [11] [12] In two of these studies, a significant proportion of the study population had underlying medical conditions. 6, 7 Herein, we describe, among a cohort of otherwise healthy adolescents and adults with influenza-like illness (ILI), the species-specific prevalence and severity of symptoms associated with HCoV infection. 13 Patients 0-65 years of age and presenting for care <72 hours after onset of ILI symptoms were recruited for study participation.

Which species are more prevalent but less severe?

[1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI). [4] [5] [6] [7] [8] [9] [10] [11] Five previous studies have described the species-specific clinical characteristics of HCoV infection among adults. 6, 7, [10] [11] [12] In two of these studies, a significant proportion of the study population had underlying medical conditions.

Symptom severity was rated on an ordinal scale from 0 (none) to 3 (severe). Symptom severity scores were quantified using the following five measures: (i) individual symptom score for 20 symptoms, (ii) the upper respiratory symptom score, calculated as the sum of severity scores for earache, runny nose, sore throat, and sneezing, (iii) the lower respiratory symptom score, calculated as the sum of severity scores for cough, difficulty breathing, hoarseness, and chest discomfort, (iv) the gastrointestinal symptom score, calculated as the sum of severity scores for diarrhea, vomiting, anorexia, nausea, and (Table 1) . There was season-to-season variability in the leading causes of The findings of our study, conducted over a 5-year period at five geographically dispersed sites in the USA, demonstrate that human coronavirus (HCoV) is an important cause of influenza-like illness (ILI) ranged from 4% to 22%.

Which species are more prevalent but less severe?

[1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI). [4] [5] [6] [7] [8] [9] [10] [11] Five previous studies have described the species-specific clinical characteristics of HCoV infection among adults. 6, 7, [10] [11] [12] In two of these studies, a significant proportion of the study population had underlying medical conditions.

Human coronavirus (HCoV) is a known cause of influenza‐like illness (ILI). In a multisite, observational, longitudinal study of ILI among otherwise healthy adolescents and adults, 12% of subjects were PCR‐positive for HCoV. The distribution of species was as follows: HCoV‐OC43 (34%), HCoV‐229E (28%), HCoV‐NL63 (22%), and HCoV‐HKU1 (16%).

Which species are more prevalent but less severe?

[1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI). [4] [5] [6] [7] [8] [9] [10] [11] Five previous studies have described the species-specific clinical characteristics of HCoV infection among adults. 6, 7, [10] [11] [12] In two of these studies, a significant proportion of the study population had underlying medical conditions.

The strengths of this study of HCoV in otherwise healthy adolescents and adults include its multisite and multiyear design, the use of a multiplex diagnostic panel, the prospective collection of symptom data, and the use of a symptom severity scale similar to what has been employed previously. 15 One important limitation of this study was our selective recruitment of individuals who had presented to a healthcare facility for care of an ILI. Therefore, our cases are not representative of HCoV infection in the community, where individuals with mild, self-limiting illness due to HCoV opt not to seek medical care for the management of their ILI.

Which species are more prevalent but less severe?

[1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI). [4] [5] [6] [7] [8] [9] [10] [11] Five previous studies have described the species-specific clinical characteristics of HCoV infection among adults. 6, 7, [10] [11] [12] In two of these studies, a significant proportion of the study population had underlying medical conditions.

Both inpatient and outpatient subjects were eligible to participate. Patients with underlying medical conditions (eg, diabetes, chronic obstructive pulmonary disease, severe asthma), women with a high-risk or complicated pregnancy, and patients with a poorly controlled psychiatric disorder were excluded. Information on patient demographics and presence/severity of symptoms at the time of enrollment was collected by in-person interview.

Which species are more prevalent but less severe?

[1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI). [4] [5] [6] [7] [8] [9] [10] [11] Five previous studies have described the species-specific clinical characteristics of HCoV infection among adults. 6, 7, [10] [11] [12] In two of these studies, a significant proportion of the study population had underlying medical conditions.

Information on patient demographics and presence/severity of symptoms at the time of enrollment was collected by in-person interview. Participants were then instructed on the use of a daily diary to record the presence/severity of symptoms for 7 days following initial symptom onset. Symptom severity was rated on an ordinal scale from 0 (none) to 3 (severe).

Which species are more prevalent but less severe?

[1] [2] [3] By contrast, other HCoV species (HCoV-HKU1, HCoV-OC43, HCoV-NL63, and HCoV-229E) are much more prevalent, much less severe, and common causes of influenza-like illness (ILI). [4] [5] [6] [7] [8] [9] [10] [11] Five previous studies have described the species-specific clinical characteristics of HCoV infection among adults. 6, 7, [10] [11] [12] In two of these studies, a significant proportion of the study population had underlying medical conditions.

13 Patients 0-65 years of age and presenting for care <72 hours after onset of ILI symptoms were recruited for study participation. ILI was defined as a temperature ≥100.4°F and sore throat or one of the following respiratory symptoms: cough, sputum production, shortness of breath, or chest pain. Both inpatient and outpatient subjects were eligible to participate.

What is required for a Hepatitis B infection in cells?

Even primary human hepatocytes rapidly lose the capacity for HBV infection after brief cell culture. The HBV infection demands both intracellular and cell-surface factors. The intracellular requirements appear less stringent, as after transfection of HBV DNA into many HCC cell lines or mouse liver, which cannot be infected naturally, the viral genome is expressed and replicates actively.

Text: Among the five hepatotropic hepatitis viruses, only hepatitis B virus (HBV) and its satellite hepatitis D virus (HDV) still wait for the development of an in vitro infection system in cell culture. One hepatocellular carcinoma (HCC) cell line, HepaRG, can be infected at a modest efficiency after weeks of culture and induced differentiation [1] . Even primary human hepatocytes rapidly lose the capacity for HBV infection after brief cell culture.

What is required for a Hepatitis B infection in cells?

Even primary human hepatocytes rapidly lose the capacity for HBV infection after brief cell culture. The HBV infection demands both intracellular and cell-surface factors. The intracellular requirements appear less stringent, as after transfection of HBV DNA into many HCC cell lines or mouse liver, which cannot be infected naturally, the viral genome is expressed and replicates actively.

The intracellular requirements appear less stringent, as after transfection of HBV DNA into many HCC cell lines or mouse liver, which cannot be infected naturally, the viral genome is expressed and replicates actively. Thus, the failure of HBV infection is considered largely to be due to strict restriction on the interaction between HBV virions and the cell membrane. The molecules on the cell membrane needed for HBV infection can be divided into two classes: low affinity and high affinity molecules.

What is required for a Hepatitis B infection in cells?

Even primary human hepatocytes rapidly lose the capacity for HBV infection after brief cell culture. The HBV infection demands both intracellular and cell-surface factors. The intracellular requirements appear less stringent, as after transfection of HBV DNA into many HCC cell lines or mouse liver, which cannot be infected naturally, the viral genome is expressed and replicates actively.

The molecules on the cell membrane needed for HBV infection can be divided into two classes: low affinity and high affinity molecules. Among others, the heparan sulfates in the membrane proteins mediate the broad, but less specific, virus-cell interaction. However, the high affinity membrane partners for HBV remain elusive (the carboxypeptidase D found for duck hepatitis B virus may be the only serious contender [2] ).

What is required for a Hepatitis B infection in cells?

Even primary human hepatocytes rapidly lose the capacity for HBV infection after brief cell culture. The HBV infection demands both intracellular and cell-surface factors. The intracellular requirements appear less stringent, as after transfection of HBV DNA into many HCC cell lines or mouse liver, which cannot be infected naturally, the viral genome is expressed and replicates actively.

However, the high affinity membrane partners for HBV remain elusive (the carboxypeptidase D found for duck hepatitis B virus may be the only serious contender [2] ). HBV envelope protein, namely the surface antigens, plays an essential role in the infection process. Both genetic and functional examination identified one domain in the Nterminus of HBV preS1 (amino acids 1-47) necessary for infection.

What is required for a Hepatitis B infection in cells?

Even primary human hepatocytes rapidly lose the capacity for HBV infection after brief cell culture. The HBV infection demands both intracellular and cell-surface factors. The intracellular requirements appear less stringent, as after transfection of HBV DNA into many HCC cell lines or mouse liver, which cannot be infected naturally, the viral genome is expressed and replicates actively.

Immunofluorescence staining clearly demonstrated the expression of HBV and HDV proteins in these cell lines, suggestive of a successful viral infection. In addition, they documented a 2-4-fold increase of viral RNA and DNA after infection in the cell line by real-time PCR. They also showed a Southern blot supporting the presence of HBV covalently closed circular DNA in the infected cell, a well-recognized marker for productive HBV infection.

What is required for a Hepatitis B infection in cells?

Even primary human hepatocytes rapidly lose the capacity for HBV infection after brief cell culture. The HBV infection demands both intracellular and cell-surface factors. The intracellular requirements appear less stringent, as after transfection of HBV DNA into many HCC cell lines or mouse liver, which cannot be infected naturally, the viral genome is expressed and replicates actively.

The same protein was pulled down from human hepatocytes as well. The authors further produced HCC cell lines stably expressing NTCP and subsequently infected them with HBV or HDV. Immunofluorescence staining clearly demonstrated the expression of HBV and HDV proteins in these cell lines, suggestive of a successful viral infection.

What is required for a Hepatitis B infection in cells?

Even primary human hepatocytes rapidly lose the capacity for HBV infection after brief cell culture. The HBV infection demands both intracellular and cell-surface factors. The intracellular requirements appear less stringent, as after transfection of HBV DNA into many HCC cell lines or mouse liver, which cannot be infected naturally, the viral genome is expressed and replicates actively.

For example, the authors can use the NTCP-expressing cell lines as the starting materials to systemically identify other factors (maybe carboxypeptidase D) and make these cell lines more productive and permissive to HBV infection. In the near future, standard virological assays for HBV infections, including Northern or Western blots, are expected to demonstrate the successful HBV infections in vitro. The HBV research community has searched for HBV receptors for decades.

What is required for a Hepatitis B infection in cells?

Even primary human hepatocytes rapidly lose the capacity for HBV infection after brief cell culture. The HBV infection demands both intracellular and cell-surface factors. The intracellular requirements appear less stringent, as after transfection of HBV DNA into many HCC cell lines or mouse liver, which cannot be infected naturally, the viral genome is expressed and replicates actively.

Both genetic and functional examination identified one domain in the Nterminus of HBV preS1 (amino acids 1-47) necessary for infection. This domain has been shown to function as a direct mediator for HBV by binding presumably cellular corresponding receptor(s) [3] . More importantly, the myristoylated peptide is shown to effectively block HBV infection in primary human hepatocytes and in the human hepatocytechimera mouse at a nanomolar concentration [4] .

What is required for a Hepatitis B infection in cells?

Even primary human hepatocytes rapidly lose the capacity for HBV infection after brief cell culture. The HBV infection demands both intracellular and cell-surface factors. The intracellular requirements appear less stringent, as after transfection of HBV DNA into many HCC cell lines or mouse liver, which cannot be infected naturally, the viral genome is expressed and replicates actively.

Following the successful cloning of receptor for SARS coronavirus a few years ago, Dr. Wenhui Li and colleagues raised attention again by publishing a possible receptor for hepatitis B virus in eLife. We will briefly review the significance of this finding and the future prospects of hepatitis B research. Text: Among the five hepatotropic hepatitis viruses, only hepatitis B virus (HBV) and its satellite hepatitis D virus (HDV) still wait for the development of an in vitro infection system in cell culture.

What is required for a Hepatitis B infection in cells?

Even primary human hepatocytes rapidly lose the capacity for HBV infection after brief cell culture. The HBV infection demands both intracellular and cell-surface factors. The intracellular requirements appear less stringent, as after transfection of HBV DNA into many HCC cell lines or mouse liver, which cannot be infected naturally, the viral genome is expressed and replicates actively.

The HBV research community has searched for HBV receptors for decades. Many candidates have been discovered and then discarded. The current study, however, took advantage of a well-documented viral peptide required for HBV entry in combination with a state-of-the-art proteomics platform. As a Chinese proverb says "a thousand-mile journey starts from one incremental step".

What is required for a Hepatitis B infection in cells?

Even primary human hepatocytes rapidly lose the capacity for HBV infection after brief cell culture. The HBV infection demands both intracellular and cell-surface factors. The intracellular requirements appear less stringent, as after transfection of HBV DNA into many HCC cell lines or mouse liver, which cannot be infected naturally, the viral genome is expressed and replicates actively.

have taken a reasonable approach to fish out possible HBV receptor(s) [6] . They engineered the first 2-47 amino acid peptide from PreS1 to increase its capacity to be cross-linked with proteins interacting with the cell membrane, without affecting its binding specificity. In order to obtain sufficient materials after cross-linking, they adopted the Tupaia hepatocytes, instead of human hepatocytes, for the experiments.

What is required for a Hepatitis B infection in cells?

Even primary human hepatocytes rapidly lose the capacity for HBV infection after brief cell culture. The HBV infection demands both intracellular and cell-surface factors. The intracellular requirements appear less stringent, as after transfection of HBV DNA into many HCC cell lines or mouse liver, which cannot be infected naturally, the viral genome is expressed and replicates actively.

They also showed a Southern blot supporting the presence of HBV covalently closed circular DNA in the infected cell, a well-recognized marker for productive HBV infection. Finally, they identified a stretch of 10 amino acids in the NTCP transmembrane domain, as the motif directly interacting with the PreS1 peptide. NTCP is a transmembrane protein, usually located in the lateral surface (canalicular) of hepatocytes, which mediates bile acid transport [7] .

What is required for a Hepatitis B infection in cells?

Even primary human hepatocytes rapidly lose the capacity for HBV infection after brief cell culture. The HBV infection demands both intracellular and cell-surface factors. The intracellular requirements appear less stringent, as after transfection of HBV DNA into many HCC cell lines or mouse liver, which cannot be infected naturally, the viral genome is expressed and replicates actively.

More importantly, the myristoylated peptide is shown to effectively block HBV infection in primary human hepatocytes and in the human hepatocytechimera mouse at a nanomolar concentration [4] . In fact, a clinical trial testing the efficacy of this peptide in preventing HBV infection has been ongoing [5] . Clearly, this preS1 peptide can be a useful probe to pull out the interacting cellular factors, including specific viral receptors.

What is required for a Hepatitis B infection in cells?

Even primary human hepatocytes rapidly lose the capacity for HBV infection after brief cell culture. The HBV infection demands both intracellular and cell-surface factors. The intracellular requirements appear less stringent, as after transfection of HBV DNA into many HCC cell lines or mouse liver, which cannot be infected naturally, the viral genome is expressed and replicates actively.

As a Chinese proverb says "a thousand-mile journey starts from one incremental step". As such, the identification of NTCP as a potential viral receptor for HBV may serve as an important initial step for this journey, leading to the development of an HBV infection system to facilitate the HBV research and hepatitis B treatment.

What regulates the broad, but less specific, virus-cell interaction in a hepatitis B infection?

The molecules on the cell membrane needed for HBV infection can be divided into two classes: low affinity and high affinity molecules. Among others, the heparan sulfates in the membrane proteins mediate the broad, but less specific, virus-cell interaction. However, the high affinity membrane partners for HBV remain elusive (the carboxypeptidase D found for duck hepatitis B virus may be the only serious contender [2] ).

The intracellular requirements appear less stringent, as after transfection of HBV DNA into many HCC cell lines or mouse liver, which cannot be infected naturally, the viral genome is expressed and replicates actively. Thus, the failure of HBV infection is considered largely to be due to strict restriction on the interaction between HBV virions and the cell membrane. The molecules on the cell membrane needed for HBV infection can be divided into two classes: low affinity and high affinity molecules.

What regulates the broad, but less specific, virus-cell interaction in a hepatitis B infection?

The molecules on the cell membrane needed for HBV infection can be divided into two classes: low affinity and high affinity molecules. Among others, the heparan sulfates in the membrane proteins mediate the broad, but less specific, virus-cell interaction. However, the high affinity membrane partners for HBV remain elusive (the carboxypeptidase D found for duck hepatitis B virus may be the only serious contender [2] ).

However, the high affinity membrane partners for HBV remain elusive (the carboxypeptidase D found for duck hepatitis B virus may be the only serious contender [2] ). HBV envelope protein, namely the surface antigens, plays an essential role in the infection process. Both genetic and functional examination identified one domain in the Nterminus of HBV preS1 (amino acids 1-47) necessary for infection.