Any of a group of microorganisms of the genus Chlamydia that are obligate intracellular parasites and include the causative agents of trachoma,psittacosis,and lymphogranuloma venereum.

• 衣原体属微生物，贝宗（氏）体属微生物一种衣原体属微生物群，是一种专性细胞内的寄生虫，包括颗粒性结膜炎、鹦鹉病、淋巴肉芽肿的病原体。