Chlamydia pneumonia ( C. p), as the third species of Chlamydia genus, is an obligate intracellular pathogen. Chlamydia pneumonia is a common human pathogen which can cause respiratory tract infection such as pneumonia, pharyngitis and sinusitis. 肺炎衣原体(ChlamydiaPneumonia.C.pn)是衣原体属的第三个新种,专性细胞内寄生菌,常见的呼吸道病原菌,可引起包括肺炎,咽炎,鼻窦炎在内的呼吸系统疾病。