text: A组β溶血性链球菌的抗原性很复杂，其荚膜由透明质酸组成，与人体关节、滑膜有共同抗原；其细胞壁外层蛋白质中M蛋白和M相关蛋白、中层多糖中N-乙酰葡萄胺和鼠李糖均与人体心肌和瓣膜有共同抗原；其细胞膜的蛋白与人体心肌肌膜和丘脑下核、尾状核之间有共同抗原。
entities.entity: A组β溶血性链球菌
entities.label: mic
entities.entity: 荚膜
entities.label: mic
entities.entity: 关节
entities.label: bod
entities.entity: 滑膜
entities.label: bod
entities.entity: 细胞壁
entities.label: bod
entities.entity: M蛋白
entities.label: bod
entities.entity: M相关蛋白
entities.label: bod
entities.entity: 多糖
entities.label: bod
entities.entity: N-乙酰葡萄胺
entities.label: bod
entities.entity: 鼠李糖
entities.label: bod
entities.entity: 心肌
entities.label: bod
entities.entity: 瓣膜
entities.label: bod
entities.entity: 细胞膜
entities.label: bod
entities.entity: 心肌肌膜
entities.label: bod