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目的分析鹤庆县2009-2011年螺情下降缓慢的原因。方法收集2009-2011年血吸虫病流行区的查灭螺资料并进行整理分析。结果鹤庆县2009-2011年在历史灭钉螺面积和可疑环境中查出的钉螺面积占全县钉螺面积的比例为16.00%、45.69%、27.75%;在上年度灭螺面积中查出的钉螺复现面积占全县钉螺面积的比例分别为84.00%、54.31%、72.25%。2009-2011年各项螺情指标下降村数大于上升村数;2009-2011年全县查出有钉螺的行政村为26个,其中高原峡谷地区占15个,占全县有螺村的57.69%;2009-2011年高原峡谷地区各年钉螺面积占全县钉螺面积的比例为55.18%～60.77%,有螺框出现率和活螺平均密度高原峡谷地区高于高原平坝地区。结论鹤庆县2009-2011年螺情下降速度缓慢,应总结经验,提高质量,因地制宜,采用药物灭螺和环境改造灭螺并重的综合治理措施,彻底改变钉螺孳生环境,大幅度压缩钉螺面积。
Objective To analyze the causes of the slow decline of the snail in Heqing County from 2009 to 2011. Methods The data of snail schistosomiasis from 2009-2011 were collected and analyzed. Results The proportion of snail snails in Hexi County during the period of 2009-2011 was 16.00%, 45.69% and 27.75%, respectively, in the areas with the history of snail snail and suspicious environment. Reproductive area of the county snails area ratio was 84.00%, 54.31%, 72.25%. In 2009-2011, the number of descendants of each index dropped more than that of ascended villages; from 2009 to 2011, there were 26 administrative villages with snails found in the county, of which 15 are plateau canyons, accounting for 57.69 %; In 2009-2011, the area of snail snail in each year in the plateau canyon accounted for 55.18% ~ 60.77% of the snail snail area in the whole province, with the occurrence rate of snail box and average density of snail plateau in the plateau canyon area higher than that in the plateau Pingba area. Conclusion The decline of snails in Heqing County during 2009-2011 is slow. We should sum up experience, improve quality and adapt to local conditions. We adopt comprehensive measures to eliminate mollusc both snails and environmental remediation, completely changing snail breeding environment and greatly reducing the area of snails.