Objective To make an epidemiological survey of risk factor of clonorchiasis among the residents near the banks of the Huaihe river system.

• 目的调查淮河沿岸肝吸虫病流行的危险因素。方法采用实验流行病调查法,对中间宿主、终宿主和沿岸部分居民作现场查询、体检和粪检。