Abstract: Objective Objective To understand the distribution and characteristics of historical Oncomelania hupensis snail environ? ments and wetland environments in Wuxi City since 1952，so as to provide the evidence for formulating the monitoring strategy after the schistosomiasis transmission was interrupted. Methods Methods A cross?sectional survey was conducted to collect the informa? tion of historical O. hupensis snail environments and wetland environments. Google Earth was used to present and analyze the distribution and characteristics of them. Results Results There were 2 124 historical O. hupensis snail environments in Wuxi City and the accumulative area was 2 995.7 hm2 . In 2013，there were 61 surveillance sites of wetland with the area of 32.8 hm2 ；totally 1 695 snails were caught and no O. hupensis snails were found. Conclusion Conclusion The historical O. hupensis snail environments were distributed widely and covered a large area in Wuxi City. The surveillance should be focused on the key environments and wetland.

Key words: Schistosomiasis；Historical snail environment； Wetland environment； Distribution；Wuxi City

摘要： 目的 目的 调查无锡市自1952年以来历史有螺环境及城市湿地环境的分布现状和特点， 为全市制定血吸虫病传播 阻断后的监测策略提供依据。 方法 方法 收集全市历史有螺环境和城市湿地环境相关信息， 建立数据库， 并应用谷歌地球 （Google Earth） 软件绘制分布图， 分析各类环境特点。 结果 结果 无锡市历史有螺环境共有2 124个， 累计历史有螺面积为 2 995.7 hm2 ， 其中IV类环境871个， 面积871.2 hm2 ， 占29.1%。2013年无锡市共有城市湿地监测点61个， 面积32.8 hm2 ， 共 捕获螺类1 695只， 未捕获到钉螺。 结论 结论 无锡市历史有螺环境分布广， 面积大， 应重点加强对其中的IV类环境以及城 市湿地的监测。

关键词: 血吸虫病； 历史有螺环境； 湿地环境； 分布； 无锡市