2007年湖北省血吸虫病监测点钉螺监测结果分析

目的了解湖北省钉螺和感染性钉螺分布特点与规律。方法按照湖北省血吸虫病监测方案的要求,在全省血吸虫病流行区选择有代表性的74个流行村作为监测点,采用系统抽样结合环境抽样的方法,对监测点开展钉螺和感染性钉螺分布情况监测。结果74个监测点活螺密度、感染螺密度和钉螺感染率分别为0.474、0.000 51只/0.1 m~2和0.107%。垸内型监测村、河道和防浪林的活螺密度分别为0.784、0.738和0.673只/0.1 m~2,河道的感染螺平均密度为0.003 36只/0.1 m~2。在9个血吸虫病传播控制监测点中,有2个点查出了感染性钉螺。结论钉螺疫情比2006年下降,但垸内型监测村、河道和防浪林的活螺平均密度、河道的感染螺平均密度仍较高。应该加强重点地带钉螺,尤其是感染性钉螺的控制工作。

Analysis on the results of snail survey in schistosomiasis surveillance sites in Hubei Province in 2007

Objective To understand the characteristics and rules of the distributions of snails and infected snails in Hu- bei Province.Methods According to the scheme of the Hubei Provincial Schistosomiasis Surveillance,74 schistoso- miasis surveillance sites(villages)were selected and established.The distributions of snails and infected snails were sur- veyed using systematic and environmental sampling.Results In the 74 surveillance sites,the density of living snail was 0.474/0.1 m~2,the density of infected snail was 0.000 51/0.1 m~2,and snail infection rate was 0.107%.The densities of living snail in surveillance village of inner embankment,riverway and preventing wave forest were 0.784/0.1 m~2,0.738/ 0.1 m~2 and 0.673/0.1 m~2,respectively.The density of infected snail in riverway was 0.003 36/0.1 m~2.The infected snails were found out in 2 out of 9 surveillance sites transmission controlled.Conclusion Compared with 2006.the en- demic situation of snail was descended,but the densities of living snail in surveillance village of inner embankment,river- way and preventing wave forest were still high,the density of infected snail in riverway was also high.So snail control, especially infected snail control should be enhanced.