Abstract: Objective Objective To master the dynamic endemic status and influencing factors of schistosomiasis in Yunnan Prov? ince，so as to provide the evidence for making the control and prevention measures. Methods Methods Four villages of four schistosomi? asis heavy endemic counties were selected as survey sites. Then，the serological screening and etiological tests were carried out in the residents，and the basic situations of the survey sites were investigated. The infection status of the livestock and relevant information of Oncomelania hupensis snails were surveyed. All the results were analyzed statistically. Results Results Totally 4 310 res? idents were surveyed by the indirect hemagglutination assay with the examination rate of 79.68% and serum positive rate of 8.40%. The positive rate reached upwards 12.53% in Qiandian Village of Eryuan County. The serum positive rate of the female was higher than that of the male，and the positive rates of the 30 years and older age groups were higher than those of the other age groups. The serum positive rates of the peasants，migrant labourers and residents with the junior high school education level were higher. No positive feces were found. A total of 24 advanced cases were reported. No positive livestock and snails were found，and the average density of living snails was 0.023 3-0.056 6/0.1 m2 . Conclusion Conclusion Right now，the schistosomiasis is at a low prevalence status in Yunnan Province，and the endemic situation has been effectively controlled.

Key words: Schistosomiasis；Surveillance；Endemic situation；Yunnan Province

摘要： 目的 目的 掌握云南省血吸虫病疫情动态和影响因素， 为制定防治措施提供依据。 方法 方法 选择4个血吸虫病疫情 较重的县 （市） 的4个村作为国家级监测点。按全国监测方案的要求， 对监测点内居民进行血吸虫感染血清学筛查 （IHA） 和病原学检查， 并开展监测点基本情况调查、 家畜病情监测和螺情调查。计算和分析人群血检阳性率、 粪检阳性率、 家畜 感染率、 钉螺感染率和活螺密度等监测指标。 结果 结果 IHA共筛查4 310人， 受检率为79.68%， 阳性率为8.40%， 洱源县前甸 村阳性率高达12.53%。女性阳性率略高于男性， 30岁及以上年龄段、 农民、 民工和初中文化程度者感染率较高。血检阳性 者中未查出粪检阳性者。现存晚期血吸虫病病人24例。4村均未检出感染性家畜和钉螺， 活螺平均密度为0.023 3 ~ 0.056 6只/0.1 m2 。结论 结论 监测点村疫情已得到有效控制， 云南省血吸虫病处于低流行状态。

关键词: 血吸虫病； 监测； 疫情； 云南省