目的了解云南鹤庆县部分高原峡谷血吸虫流行村离村民居住地较远的特殊环境中的钉螺分布及海拔。方法 2010-2011年成立调查组对海拔相对较高的金墩乡磨光、西甸2个行政村可疑有螺环境和特殊环境开展查螺,查到钉螺建好调查卡,捕获框内钉螺,分袋包装,带回室内用压碎法检查其感染性。结果鹤庆县金墩乡高原峡谷地区山脉较多,有泉眼、小片沼泽地和荒浸地,为高原峡谷型血吸虫病流行村。磨光村查到钉螺分布海拔2 406±11.9 m的环境1处,钉螺面积为1 334 m2,调查49框,查出有螺框9框,有螺框出现率为18.37%,查到钉螺107只,全部为活螺,活螺平均密度为2.18只/0.11 m2,活螺最高密度为14只/0.11 m2。西甸村查到钉螺分布海拔较高的环境3处,最高海拔高度为2 371 m,钉螺面积3 651.8 m2,有螺框出现率21.76%,活螺平均密度为1.81只/0.11 m2,活螺最高密度为25只/0.11 m2。捕获钉螺用压碎法检查没有发现阳性钉螺。结论鹤庆县为高原峡谷,地形复杂地区均查出有钉螺分布,开展查螺的范围,不应只是历史有螺的范围,还应包括辖区内可疑有钉螺孳生的环境。 Objective To understand the snail distribution and altitude in the special environment where schistosomiasis endemic villages in part of plateau gorge of Heqing County, Yunnan Province are far away from the villagers’ residence. Methods A survey team was set up in 2010-2011 to polish the Jindun Township, which has a relatively high altitude, and investigate the suspicious snail environment and special environment in two administrative villages in Xidian. Sub-bag packaging, back to the indoor crushing method to check its infectivity. Results Hedian County, Heqing County Plateau Canyon area more mountains, springs, small swamps and wasteland, for the plateau-type schistosomiasis canyon village. Polished villages found snails distributed in an altitude of 2 406 ± 11.9 m 1 environment, snail area of ​​1 334 m2, survey 49 boxes were found 9 box screw frame, screw frame rate of 18.37% found 107 snails , All of them were live snails. The average density of live snails was 2.18 /0.11 m2, and the highest density of live snails was 14 /0.11 m2. Xidian village found snails distributed in three higher altitude environment, the maximum altitude of 2 371 m, snail area of ​​3 651.8 m2, the occurrence rate of 21.76% screw frame, live snail average density of 1.81 /0.11 m2, live snail The highest density of 25 /0.11 m2. Capture snails crush test found no positive snails. CONCLUSIONS: Heqing County is a plateau canyon and has complicated distribution areas with snail distribution. The scope for carrying out snail searching should not only be in the area of ​​history snail, but also suspicious snail breeding area in the area.