Objective: To understand the spatial distribution characteristics of wild feces in schistosomiasis endemic areas of Jiangling County, Hubei Province and further explore the source of infection efficiently, so as to provide the evidence for the development of corresponding monitoring and response technology.
Methods: In 2011, the fresh wild feces were investigated every two months in the selected 15 villages by the severity of historical endemic in Jiangling County. The schistosome miracidium hatching method was used to test the schistosome infection of the wild feces. The descriptive analysis and spatial analysis were used for the description of the spatial distribution of the wild feces.
Results: Totally 701 wild feces samples were collected with the average density of 0.055 6/100 m2, and the positive rate of the wild feces was 11.70% (82/701). The results of the regression analysis showed a positive spatial correlation between the positive rate of wild feces and the rate of human infection, the area with infected Oncomelania hupensis and the number of fenced cattle, and the corrected R2 of the model was 0.58.
Conclusions: The infection rate of wild feces is positively correlated with the rate of human infection, area with infected O. hupensis and number of fenced cattle in space in Jiangling County, so the prevention and control measures could be conducted according to the spatial distribution of the positive wild feces.
[摘要]目的 了解湖北省江陵县血吸虫病流行区野粪分布及阳性情况, 并对其空间分布特征进行分析描述, 以及时发 现传染源, 为制定相应的监测与响应措施提供科学依据。方法 2011年在江陵县血吸虫病流行区, 将疫情按严重程度 分为高、中、低3层, 每层抽取5个自然村作为调查点, 选取江滩和沟渠作为调查环境, 收集野粪并采用尼龙绢袋集卵孵化 法检查。此外, 采用描述性分析和空间分析方法, 对野粪进行空间分布特征描述和回归分析。结果 现场调查共收集野 粪701份, 野粪平均密度为0.055 6份/100 m2; 检出阳性野粪82份, 野粪阳性率为11.70%。回归分析结果表明, 野粪阳性 率与人群感染率、感染性钉螺面积和耕牛存栏数之间存在空间相关性, 其模型的校正R2值为0.58。结论 江陵县野粪阳 性率与人群感染率、感染性钉螺面积及耕牛存栏数之间存在空间正相关关系, 可以根据其空间分布特征进行重点防控。.
Keywords: Jiangling County; Regression analysis; Schistosomiasis; Space-time distribution; Wild feces.