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目的了解有螺沟渠硬化后钉螺复现的影响因素,提出改进措施,提高沟渠硬化工程的灭螺效果。方法采用回顾性调查与现场调查相结合的方法,收集荆门市13个血吸虫病流行区乡(镇)实施沟渠硬化灭螺工程和螺情资料,统计沟渠硬化工程的灭螺效果,分析钉螺复现的原因。结果共调查151条硬化沟渠,71条沟渠钉螺复现,复现沟渠条数占47.02%。钉螺面积灭光率为78.79%。钉螺复现的主要原因为上游螺区扩散、硬化沟渠破损、工程前未药物灭螺和施工带入钉螺等。结论单纯硬化有螺沟渠并不能彻底消灭钉螺;科学规划沟渠硬化工程、工程前药物灭螺和加强工程后期维护是提高灭螺效果的关键。
Objective To understand the factors that affect the recurrence of Oncomelania snail after curing, and to propose the improvement measures to improve the snail control effect of the ditch hardening project. Methods A retrospective survey and field investigation were carried out to collect the information of snail ditches and sclerotinization in 13 villages and towns in the endemic areas of Jingmen City, s reason. Results A total of 151 sclerosing ditches and 71 ditch snails were found, accounting for 47.02% of the recurring ditches. Snail area extinction rate of 78.79%. Snail recurrence of the main reasons for the spread of the upper spiral zone, hardened ditch damage, the project before the non-drug snail and construction into the snail and so on. Conclusions Purely scalloped ditch can not completely eliminate snails. Scientific ditch sclerosis project, pre-project snail-killing and post-construction maintenance are the keys to improve snail-killing effect.