商城县位于河南省南部边缘的大别山区,原以班氏丝虫病为主,马来丝虫病次之的混合感染流行区,经过反复查治于一九七五年达基本消灭标准。一九七九年与一九八一年分别在河风桥、汪桥两个公社开展“海盐”净化试点工作,一九八二年全县实施了海盐净化。巩固了丝防成果。在净化阶段,丝虫病感染率、感染度很低,而大面积 Shangcheng County, located in the Dabie Mountain area on the southern edge of Henan Province, was dominated by Bancroftian filariasis and was the second most common epidemic area of ​​mixed infection with Malay filariasis. After repeated investigations, it was up to standard of elimination in 1975. In 1979 and 1981 respectively, “Haiyan” purification pilot project was carried out at Hefeng Bridge and Wangqiao Communes. In 1982, the county implemented sea salt purification. Consolidated the Silk screen results. In the purification stage, the rate of filariasis infection, infection is very low, and large area