目的掌握水网地区达到血吸虫病传播阻断标准后螺情动态变化规律,为控制钉螺提供依据。方法采用以村为单位轮流普查、重点环境抽查、联防互查、设监测点打捞漂浮物、监测点诱螺和对来自流行省(市)的船只自制细网兜捞刮等方法查螺。结果在5个县(市、区)8个乡(镇)38个村查到292个有螺条块、6701框钉螺,面积53.5hm2。钉螺最高密度104只/0.1m2,捕捉并解剖钉螺66073只,未发现血吸虫感染。602个监测点打涝漂浮物431t,设诱螺草垫37384块,调查外来船只17998只,均未查到钉螺。结论嘉兴市存在残存钉螺,但血吸虫病疫情稳定。今后螺情监测的重点是20年内曾有钉螺的周围环境及灌溉水系的下游环境。 Objective To grasp the dynamic changes of the snails after the water network reaches the blocking criteria of schistosomiasis transmission and provide the basis for the control of snails. Methods The survey was conducted by means of round-robin surveys of the village units, spot checks of key environments, cross-check of each other, setting of fishing spots for floating at monitoring points and monitoring of spotting snails and self-made fine net fishing tackles from ships in popular provinces (municipalities). Results There were 292 snail blocks and 6701 snails found in 38 villages of 8 townships (towns) in 5 counties (cities and districts) with an area of ​​53.5hm2. The highest density of snails 104 / 0.1m2, capture and dissection of 66073 snails, did not find schistosome infection. There were 431t of flooding and floating objects in 602 monitoring spots and 37384 of lure-in-place mats. 17,998 foreign ships were surveyed, and snails were not found. Conclusion There are remnant snails in Jiaxing City, but the epidemic situation of schistosomiasis is stable. In the future, stress monitoring will focus on the environment surrounding the snail and the downstream environment of the irrigation water system within 20 years.