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目的准确、及时了解血吸虫病流行现状,掌握流行规律,为制订调整血吸虫病防治策略和评价防治效果提供科学依据。方法采用系统抽样和环境抽样方法对全部现有钉螺环境和可疑环境进行查螺。结果 5年中四川省的有螺面积由351 853m2下降为142 983m2,活螺密度由0.70只/框(每框=0.11m2)下降为0.33只/框,钉螺感染率由0.06%下降为0%,2007-2009年全省均未发现阳性钉螺;但沟渠仍是该省钉螺最多的环境。结论各监测点螺情指标2009年比2005年有显著下降;四川省应进一步开展监测和巩固措施,防止达到血吸虫病传播控制标准后的疫情反复。
Objective To understand the prevalence of schistosomiasis in time and grasp the epidemic rules so as to provide a scientific basis for formulating prevention and control strategies for schistosomiasis and evaluating its prevention and control effects. Methods Systematic sampling and environmental sampling methods were used to check the existing snail environment and suspicious environment. Results The snail area in Sichuan Province dropped from 351 853m2 to 142 983m2 in 5 years, and the density of living snails decreased from 0.70 per box (0.11m2 per box) to 0.33 per box, and the infection rate decreased from 0.06% to 0% In 2007-2009, no positive snail was found in the province; however, the ditches were still the largest snail in the province. Conclusion The index of snail at each monitoring point has dropped significantly from 2009 to 2005. Sichuan Province should further carry out monitoring and consolidation measures to prevent the recurrence of the epidemic after the schistosomiasis control standard is reached.