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目的掌握仪征市实施预防控制血吸虫病中期规划(2004～2008年)前后钉螺消长情况,探讨钉螺面积控制策略和措施。方法采用回顾性研究方法,分析比较2002～2008年间不同环境类型螺情指标逐年变化情况,同时比较江滩钉螺面积与通江河道钉螺面积、钉螺面积与灭螺覆盖率之间的相关关系。结果2005年前钉螺面积变不大,之后强化灭螺措施,江滩和通江河道实施综合治理,钉螺面积逐年下降,内陆和感染性钉螺最终消灭。江滩钉螺面积与通江河道钉螺面积尚不能确定有线性相关关系(r=0.393,P>0.05);钉螺面积与灭螺覆盖率间有显著负相关关系(r=-0.891,P<0.05)。结论全覆盖药物灭螺结合综合治理有螺江滩和通江河道是控制钉螺面积直接有效措施。
Objective To understand the growth and development of Oncomelania snails before and after the medium-term prevention and control of schistosomiasis (2004-2008) in Yizheng, and to discuss the control strategies and measures of snail area. Methods A retrospective study was conducted to analyze and compare year-by-year changes of snail index in different environmental types between 2002 and 2008, and to compare the correlation between snail snail area and the snail snail area, snail area and snail coverage in Tongjiang River. Results The size of snails did not change much until 2005, and then intensified snail-killing measures. The river banks and the Tongjiang River were comprehensively managed. The area of snails dropped year by year, and the inland and infectious snails finally disappeared. There was a linear relationship between snail snail area and snail snail area (r = 0.393, P> 0.05). There was a significant negative correlation between Snail snail area and snail coverage (r = -0.891, P <0.05) . Conclusion It is a direct and effective measure to control snail snail area that the whole coverage of drug snail combination and comprehensive control of both Lojiang Beach and Tongjiang River.