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沙眼仍是目前世界上致盲的首位病因.1956年汤飞凡等应用鸡胚卵黄囊接种法在世界上首次从沙眼患者的眼结膜分离培养出沙眼病原—沙眼衣原体(Chlamydia trachomatis).此后,我国的
Trachoma is still the first cause of blindness in the world so far. In 1956, Tang Feifan et al. Used chick embryo yolk sac inoculation for the first time in the world to isolate Chlamydia trachomatis from the conjunctiva of trachoma patients.