text: 2.院内获得性肺炎（hospitalacquiredpneumonia，HAP）指住院48小时后发生的肺炎，HAP病原除了CAP的常见病原外，还应考虑：①原寄生在患儿口腔或肠道的细菌，多为革兰阴性杆菌，常见肠科杆菌，如肺炎克雷伯杆菌、大肠埃希菌、肠杆菌、沙雷菌、变形杆菌和枸橼酸杆菌等。
entities.entity: 院内获得性肺炎
entities.label: dis
entities.entity: hospitalacquiredpneumonia
entities.label: dis
entities.entity: HAP
entities.label: dis
entities.entity: 住院
entities.label: pro
entities.entity: 肺炎
entities.label: dis
entities.entity: HAP
entities.label: dis
entities.entity: CAP
entities.label: dis
entities.entity: 口腔
entities.label: bod
entities.entity: 肠道
entities.label: bod
entities.entity: 细菌
entities.label: mic
entities.entity: 革兰阴性杆菌
entities.label: mic
entities.entity: 肠科杆菌
entities.label: mic
entities.entity: 肺炎克雷伯杆菌
entities.label: mic
entities.entity: 大肠埃希菌
entities.label: mic
entities.entity: 肠杆菌
entities.label: mic
entities.entity: 沙雷菌
entities.label: mic
entities.entity: 变形杆菌
entities.label: mic
entities.entity: 枸橼酸杆菌
entities.label: mic