Abstract: Objective To understand the dynamics of schistosomiasis prevalent factors after the transmission interruption in Debao Country，so as to provide the evidence for establishing a control strategy. Methods By using the system sample method combined with environmental sample method，the Oncomelania hupensis snail situation was surveyed through the general survey， round survey and selection check. Schistosomiasis cases were detected from local population and floating population by serological tests and stool tests. Results Four residual snail foci were found in a village from 1988 to 1991，covering an area of 1024 m2 ， and 853 snails were dissected but no positive snail was discovered. No schistosomiasis patient was detected among 42 641 persons. No positive was found from 3165 cattle and 2063 wild mice. Conclusion The schistosomiasis situation is stable in Debao Coun? ty，but the surveillance of schistosomiasis still should be continued.

Key words: Schistosomiasis； Transmission interrupted； Surveillance；Debao County

摘要： 目的 目的 掌握德保县血吸虫病传播阻断后流行因素的动态变化， 为制订防治策略提供依据。方法 方法 采用系统抽样 结合环境抽查法进行钉螺普查、 轮查和抽查； 采用血清学和粪便检查等方法对疫区常住人口以及外来流动人员开展查 病。结果 结果 1986-2011年， 累计查螺面积2 099.85 hm2 ， 仅1988-1991年在1个村相继发现4处残存钉螺， 钉螺面积共1 024 m2 ； 共解剖钉螺853只， 未发现阳性钉螺。累计查病42 641人次， 耕牛3 165头次， 解剖野鼠2 063只， 均无阳性。结论 结论 德 保县血吸虫病疫情稳定； 但仍需继续加强监测和防治。

关键词: 血吸虫病； 传播阻断； 监测； 德保县