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目的分析安徽省长江流域螺情变化趋势,为钉螺防控提供理论依据。方法收集1992~2012年间安徽省长江流域活螺和感染性钉螺密度及钉螺感染率资料,观察其变化趋势,并分析影响螺情变化的相关因素。结果山丘活螺密度总体上最高,并于1993、1996、2001年出现高峰期;1992~1998年江滩活螺密度高于洲滩,1998年之后洲滩高于江滩,江滩活螺密度于1996、1998年出现高峰期,洲滩于2003年出现高峰期。洲滩感染性钉螺密度及钉螺感染率高于江滩、山丘,并于2004年出现高峰期,山丘于1993、1997年出现高峰期。结论长江流域螺情变化受自然和社会环境等多方面因素影响,在加强传染源控制的同时应重视螺情控制。
Objective To analyze the trend of snails in the Yangtze River Basin in Anhui Province and provide a theoretical basis for snail prevention and control. Methods Data of snail density and snail infection of live snails and infectious snails in the Yangtze River valley of Anhui Province from 1992 to 2012 were collected. The trend of snail infection was observed, and the related factors that affected snail loopholes were analyzed. Results The density of living snails was the highest in the whole area and peaked at 1993, 1996 and 2001. The densities of living snails were higher than those at beaches in 1992-1998. After 1998, The peak appeared in 1996 and 1998, and the beach in 2003 peaked. The density of infected snails and the infection rate of snails in Banzhou Beach were higher than those in riverside and hills, and peaked in 2004 with the peaks in 1993 and 1997. Conclusion The changes of snails in the Yangtze River Basin are affected by many factors, such as natural and social environment. In addition to strengthening the control of sources of infection, we should pay attention to the control of snails.