To understand the natural infection profiles of A. Cantonensis in intermediate hosts from Guangzhou, many in termediate hosts of A. Cantonensis, including Achatina fulica (A. Fulica) , Ampullaria gigas (A. Gigas) ,Cipangopaludina cahayensis and Bradybaena similaris ,yfere collected from the east, west, north, south, and center parts of Guangzhou. And then they were chopped and digested by artificial digestive juices. After artificial digestion, larvae recovered from snails were I dentified and counted under microscopic. By the analysis of data, the infection rates and average infection densities of A. Can tonensis in A. Fulica were 13. 27% (30/226) and 794 per snail, and 2. 86% (2/70) and 115 for Bradybaena similar is. There was not detection of A. Gigas and Cipangopaludina cahayensis infection in this survey. It s suggested that A. Fulica plays important role in the natural focus of A. Cantonensis in Guangzhou, and it also exhibit the infection rate of A. Fulica varies in different areas of Guangzhou and the average infection density of that correlated with snails weight.%目的 了解广州市广州管圆线虫中问宿主的感染情况.方法 采用人工消化法消化从广州市东、西、南、北、中各区收集的褐云玛瑙螺、福寿螺、中华圆田螺和同型巴蜗牛,对消化后的螺类材料中的广州管圆线虫第Ⅲ期幼虫进行观察和计数.结果 褐云玛瑙螺阳性率为13.27%(30/226),平均感染度为794条/只;同型巴蜗牛阳性率为2.86%(2/70),平均感染度为115条/只.161只福寿螺和189只中华圆田螺无阳性检出.结论广州市广州管圆线虫的自然疫源地中,褐云玛瑙螺占主导地位.不同区域褐云玛瑙螺的赙染率差异较大.褐云玛瑙螺的感染度与其重量相关.
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