Objective: To master the prevalence status of schistosomiasis in Yunnan Province in 2016, so as to provide the evidence for formulating the control strategy and intervention measures.
Methods: The schistosomiasis heavy-endemic villages were selected from each of 18 endemic counties as the survey sites. Then, the serological and etiological tests were carried out in the local residents and floating population, and the infection status of the livestock, field feces and Oncomelania hupensis snails were surveyed.
Results: The serum positive rate of schistosomiasis of local residents was 8.78% and the serum positive rate was 2.26% of floating population. No schistosome eggs were found in the stool examinations in the population. The area with snails was 80.054 6 hm2 in 2016 with an increasing rate of 45.47% compared to that in 2015. The average density of living snails was 0.031 7/0.1 m2. No schistosome-infected snails were found for the last four years and no new area with snails was found for the last three years. No positive livestock or feces were found.
Conclusions: The schistosomiasis epidemic situation is stabilized in Yunnan Province in 2016. However, the area with snails and the number of living snails are increasing, and therefore, the schistosomiasis epidemic risk still exists. So, the comprehensive control measures should be strengthened continuously.
[摘要]目的 掌握云南省血吸虫病流行态势, 为制定防控对策和干预措施提供依据。 方法 在全省18个血吸虫病流行县 (市、区) 中各选择1个疫情较重的村作为监测点, 开展本地人群、流动人群和家畜病情监测, 野粪和螺情调查。 结果 云南省本地人群血吸虫病血检阳性率8.78%, 流动人群血检阳性率2.26%; 人群粪检均未发现血吸虫卵阳性。 查出 有螺面积80.054 6 hm2, 较2015年上升45.47%; 活螺平均密度0.031 7只/0.1 m2; 已连续4年没有查出血吸虫感染性钉螺, 连续3年未发现新的钉螺环境。 家畜和野粪检测血吸虫均为阴性。 结论 2016年云南省血吸虫病疫情平稳, 但螺情有所回升, 血吸虫病传播风险仍然存在。 应继续加强以传染源控制为主的综合防控措施, 防止疫情反弹。.
Keywords: Endemic status; Schistosomiasis; Surveillance; Yunnan Province.