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四川省大山区以盆地南部横断山脉中部的大凉山区血吸虫病流行特别严重,尤以河谷阶地型为甚。为了解其感染性钉螺的分布特点和规律,我们对安宁河流域的民和、合兴村进行了调查,现将结果报告如下: 1 调查方法 1.1 钉螺调查采用系统抽样和环境抽样法,以水系为单位,从上至下逐块调查,草坪荒地等环境采用棋盘式,水田查进水口及高埂壁,将捕获之钉螺解剖检查感染情况。 1.2 根据试区内不同水系和环境选择测定哨鼠感染点 2 调查结果 2.1 不同环境中感染性钉螺分布调查发现有九种有螺环境,灌溉沟、排洪沟、田、地四种环境有感染性钉螺,沟渠中主要是农、毛渠,感染性钉螺
The epidemic of schistosomiasis in Daliangshan, in the central part of the Hengduan Mountains in the southern part of the basin, is particularly serious in the Dashan District of Sichuan Province, especially in the terraces of the valley. In order to understand the distribution characteristics and laws of their infectious snails, we conducted a survey of Minhe and Hexing villages in the Anning River Basin. The results are reported as follows: 1 Survey Methods 1.1 Snail surveys using systematic sampling and environmental sampling method, As a unit, from top to bottom block by block investigation, lawn wasteland and other environments using a checkerboard, paddy field check inlet and high trowel wall, will capture the snail anatomy check the infection. 1.2 According to different aquatic systems and environment in the test area to determine the location of sentinel infection 2 Findings 2.1 Infectious snails in different environments Distribution survey found that there are nine kinds of snail environment, irrigation ditches, drainage ditches, fields and ground four kinds of infection Sex snails, mainly in the ditch farming, hair canal, infectious snails