2007至2011年公安县钉螺疫情分析

Analysis on the epidemic surveillance of Oncomelania hupensis in Gongan County during 2007 -2011

目的分析公安县2007至2011年钉螺情况，为防治控制血吸虫病提出科学依据。方法采用回顾性调查方法收集2007至2011年公安县螺情资料，分析阳性钉螺的变化情况。结果公安县全县有钉螺孳生，易感面积达2017hm2（1hm2=10000m2），虽然阳性钉螺面积呈逐年下降，但阳性螺点多分布在垸内。结论公安县自然环境复杂，钉螺疫情仍然很重，必须加强药物灭螺和环境改造等强化措施，压缩阳性钉螺面积。

Objective To analysis the epidemic surveillance of Oncomelania hupensis in Gongan County, Hubei Province during 2007 - 2011, and bring forward the control measures. Methods A retrospective study was implemented for Oncomelania hupensis data collection. The situation changes of positive snails were analyzed. Results The Oncornelania hupensis is breeding in Gongan County, the area of susceptibility spot covers 2 017 hm2 （ 1 hm2 = 10 000 m2 ）. Although the area of positive snail has been declining by years, the spots of positive snail were located inside of embankment. Conclusion The environment in Gongan County is complex, the epidemic of Oncomelania hupensis is serious. The molluscicide and environment reconstruction are necessary measures for reducing the area of positive snail.