Abstract:

Objective To understand the distribution and the changing tendency of living snails and infected snails in Guichi District in 2012. Methods The data of snail survey in recent 3 years in Guichi District were collected and analyzed. Results In Guichi District, the area with living snails was 2627.15hm2, and no infected snails were found in 2012. The area with living snails in marshland, which showed a zonal distribution, accounted for 89.71% of the total area with snails, and mainly distributed in the lake areas. Many snail areas were dispersedly distributed in inland with complicated environments. The snails were mainly distributed in the endemic villages located along the Yangtze River, Qiupu River, Shengjinhu Lake and Jiuhua River. The main vegetation was the weed. The environments with snail were mostly close to residential sites. No new or recurrence environments with snail were found. Conclusion The environments with snails in Guichi District were complicated, the snail status showed a declining tendency, and the infected snails were first reduced to 0. It was necessary to strengthen snail surveillance and comprehensive snail control measures to reduce snail areas and susceptible areas, so as to consolidate the achievements of schistosomiasis control.

Key words: Snail, Survey