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南水北调后能否引起钉螺扩散北移,1979年3～5月,由安徽省和巢湖地区血防所,巢县、无为、和县、庐江、含山等县血防站、滁县地区和全椒县防疫站等单位组成11个调查组;对巢湖进水口、裕溪河、牛屯河、风凰岭、得胜河、巢湖闸等渠道、闸站和驷马山灌区闸站渠道河沟及全椒县灌区四个重点公社大小河沟等,从无钉螺孳生的灌区,进行了一次全面地钉螺调查。调查方法:按统一调查方案,采用系统抽样和环境相结合的方法,沿长江进水口、闸站、渠道、灌区河沟水线上1～2米内,每隔20～30米查一框(平方市尺);滩地纵横每隔20～30米查一框;柳林每10棵查一棵,并抽查可疑环境。查获的钉螺分框包装,鉴定死活、阳性,
After South-to-North Water Diversion, it could cause the spread of Oncomelania snails southward. From March to May 1979, the epidemic prevention was carried out by Blood and Anti-epidemic Station, Chao County, Wuwei County, Lujiang County and Hanshan County Blood Stations, Chu County and Quanjiao County from March to May 1979. Stations and other units to form 11 investigation teams; on the Chaohu Lake inlet, Yuxi River, Niutun River, Fenghuang Ridge, Triumph River, Chaohu Gate and other channels, gate stations and Dama Mountain Irrigation Station Gully Canal Channel and Quanjiao four A key commune size river ditch, etc., from non-snail breeding irrigation areas, conducted a comprehensive snail investigation. Survey method: According to the unified survey plan, a systematic sampling and the combination of the environment, along the Yangtze River inlet, gate, channel, Irrigation River ditch waterline within 1 to 2 meters, every 20 to 30 meters check box (square Feet); beach vertical and horizontal every 20 to 30 meters check box; Liulin check every 10 trees and spot checks suspicious environment. Snail seized box packaging, identification of living and death, positive,