已知的衣原体属有4种：沙眼衣原体（C.trachomatis，CT）、肺炎衣原体（C.pneumoniae，CP）、鹦鹉热衣原体（C.psittacosis）、家畜衣原体（C.pecorum）。
O O O B-mic I-mic I-mic O O O O O B-mic I-mic I-mic I-mic I-mic O B-mic I-mic I-mic I-mic I-mic I-mic I-mic I-mic I-mic I-mic I-mic I-mic I-mic O B-mic I-mic O O B-mic I-mic I-mic I-mic I-mic O B-mic I-mic I-mic I-mic I-mic I-mic I-mic I-mic I-mic I-mic I-mic I-mic O B-mic I-mic O O B-mic I-mic I-mic I-mic I-mic I-mic O B-mic I-mic I-mic I-mic I-mic I-mic I-mic I-mic I-mic I-mic I-mic I-mic I-mic O O B-mic I-mic I-mic I-mic I-mic O B-mic I-mic I-mic I-mic I-mic I-mic I-mic I-mic I-mic O O