Abstract: Objective To further master the Oncomelania hupensis snail situation in Huizhou District，so as to provide the ev? idence for improving the prevention and control work. Methods According to the prevalence of schistosomiasis in history and the characteristics of residual snail points in recent years，the snail surveys were carried out with the environmental sampling and sys? tematic sampling method in history snail environments and their surrounding suspicious environments. Results Totally 5 298 940 m2 in 12 administrative villages of 3 townships were investigated and there were 24 406 m2 snail areas at 5 remaining snail spots in 4 administrative villages. The highest snail density was 283 snails/0.1 m2 ，and the average density of living snails was 2.31 snails/ 0.1 m2 . A total of 4 303 snails were captured，1 534 were checked by microscopy，and no infected snails were found. Conclu? sion The snail situation is still not stable in Huizhou District， and the monitoring of snail situation still need to be strengthened.

Key words: Oncomelania hupensis； Schistosomiasis；Snail situation, Monitoring； Huizhou District

摘要： 目的 目的 进一步调查掌握徽州区螺情现状， 为防治工作提供科学依据。方法 方法 根据徽州区历史血吸虫病流行情况 和近年来残存螺点分布特点确定调查点， 对调查点范围内的可疑环境采取环境抽样结合系统抽样法进行调查， 并对所得 数据进行统计分析。结果 结果 共调查了3个乡镇、 12个行政村， 投工319人次， 调查面积529.89 hm2 。结果查出4个有螺行政 村， 5个残存螺点， 面积2.44 hm2 ， 钉螺密度最大为283只/0.1 m2 。共检获钉螺4 303只， 压片镜检1 534只， 未发现感染性钉 螺。结论 结论 徽州区螺情仍不稳定， 北干渠水系是螺情监测的重点区域。

关键词: 钉螺； 血吸虫病； 螺情； 监测； 徽州区