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江陵县资市镇是洲垸型渠道地区的血吸虫病重流行区。1992年居民感染率为29.5％。耕牛血清学检查阳性率为66.7％。垸内渠道共有66条,面积30万m~2。其中有螺渠道占97.0％,有螺面积占99.3％;感染螺渠道占7.6％,面积占18.3％。主要分布在支、干渠内,分别占45.2％、39.8％。支、干渠是牲畜放牧,尤其是牛嬉水主要场地,经搜集野粪检查血吸虫卵和水体尾蚴分布调查结果表明,牛粪是污染水体感染钉螺的主要因素。支、干渠不仅感染螺平均密度及钉螺自然感染率高,而且有感染螺分布的面积大,是洲垸型渠道中的易感地带。
The capital town of Jiangling County is the endemic area of schistosomiasis in the embankment channel area. In 1992, the resident infection rate was 29.5%. Cattle serology positive rate was 66.7%. A total of 66 embankment channels, an area of 300000 m ~ 2. Including screw channel accounted for 97.0%, with spiral area accounted for 99.3%; infection screw channel accounted for 7.6%, an area of 18.3%. Mainly distributed in branches and trunk channels, accounting for 45.2% and 39.8% respectively. Branch and trunk are livestock grazing, especially the major sites for cattle leisure. The investigation of the distribution of schistosome eggs and water cercariae by the collected wild faeces showed that cow dung was the main factor in the infection of snails by contaminated water. Branch and dry canal not only infected with snail average density and snail natural infection rate, but also the area of infection spiral distribution is continent embankment channel susceptible zone.