孝南区是国家六部委批准实施的孝感市血吸虫病综合防治试点 ,通过几年实施综合防治取得了显著效果。 1 998年夏 ,遭遇历史上特大洪水灾害 ,府沦河有螺水系受高水位洪水浸泡 3个多月 ,为了解灾后螺情变化 ,1 999年 4月对螺情进行了调查 ,并与1 998年 4月调查结果作比较分析。1　 Xiaonan District is a pilot project of integrated prevention and control of schistosomiasis in Xiaogan City, approved by six ministries and commissions of the country and achieved remarkable results through comprehensive prevention and control over several years. In the summer of 1998, it suffered a catastrophic flood disaster. The flood system of the Fulu River was soaked in high water for more than 3 months. In order to understand the changes in the snails after the disaster, investigations were conducted in April 1999 on the snails. 998 April survey results for comparative analysis. 1