Conjunctival scrapings obtained from clinically diagnosed but untreated trachoma patients were inoculated into the yolk sac of chicken embryo.

• 许多人因患沙眼而失明,丧失劳动能力,直接影响社会主义建设。摆在我们面前的任务是通过不断科学研究,加强防治沙眼工作。