Abstract: Objective To understand the key risk factors of schistosomiasis transmission in Jingzhou City，so as to provide the evidence for improving the treatment of these risk factors. Methods Each village of six counties was investigated and 3 envi? ronments were surveyed each village for the distribution of Oncomelania snails and animal stools in the field. The results were ana? lyzed and the risk factors of schistosomiasis transmission were assessed. Results The density of living snails was 0.43 snails per 0.1 m2 ，the frequency of the frames with snails was 9.12%，and no schistosome infected snails were found. All of the animal stools collected from the field were from bovines. The schistosome positive rate of animal stools was 37.50%（3/8）among the environ? ments，and the schistosome infection rate of stools was 8.11%（3/37） . The schistosome infection rate of animal stools was 0 near the residence living sites，and the positive rates were 12.50% and 8.33% in the ditches and slopes，respectively（χ2 = 0.07，P ＞ 0.05） . Conclusions Bovine is still the main infectious source of schistosomiasis，i.e. the main risk factor of the disease transmis? sion. Therefore， the strategy of controlling bovine should be strengthened.

Key words: Schistosomiasis； Transmission control；Risk factor； Jingzhou City

摘要： 目的 目的 了解影响荆州市血吸虫病传播控制达标的风险因素， 为快速处置风险提供科学依据。方法 方法 全市6个县 （市、 区） 各抽查1个村， 每村调查3个环境。以村为单位， 现场抽样调查钉螺和野粪分布情况， 并进行风险分级评估。结 结 果 果 现场抽查活螺平均密度为0.43只/0.1 m2 ， 有螺框出现率为9.12%， 未发现感染性钉螺。现场野粪均为牛粪， 环境点野 粪阳性率为37.50% （3/8）， 牛粪阳性率为8.11% （3/37）。居民点附近野粪阳性率为0， 沟渠和堤坡野粪阳性率分别为12.50% 和8.33%， 差异无统计学意义 （χ2 = 0.07， P＞0.05）。结论 结论 牛仍是荆州市主要血吸虫病传染源， 是影响传播控制达标的主 要风险因素， 需加大对牛的控制力度。

关键词: 血吸虫病； 传播控制； 风险因素； 荆州市