关键词: 血吸虫病, 疫情, 监测, 云南省

Abstract: Objective To analyze the dynamic and endemic status of schistosomiasis in at national surveillance sites in Yunnan Province from 2017 to 2019 so as to provide scientific evidences for planning prevention and control measures.  Methods Individual national surveillance site was respectively set up in 18 counties with schistosomiasis prevalence across the province. Survey and surveillance were carried out on the basic information and infection status in floating population, livestock and Oncomelania hupensis snails, 13 sites and 7 sites were weighed to undergo surveillance on the infection status in local residents and wild feces,respecitively. Results Between 2017 and 2019, the serum positive rate was respectively 6. 40% and 0. 92% for local residents and floating population in the surveillance sites in Yunnan, yet no positive case was found by stool test confirmation in the subjects with serum positive findings. Survey of a total of 6 070 livestock and 2 150 aliquots of wild feces showed no positive infection. Totally, 199. 12 hm² out of 5 675. 58 hm² areas were identified with snails. The occurrence rate of snails was 0. 54% ~ 0. 73% for each frame, and the density of living snails was 0. 017 2 to 0. 031 3 snails / 0. 1m². No positive snails were found. Conclusion Schistosomiasis prevalence is generally and effectively controlled in Yunnan Province, for no infection was identified in population, livestock and snails in our surveillance sites. Also, the area with snail habitats remains low. Suggestions on the following measures should include enhanced monitoring of imported infection sources, establishment of quick response system for surveillance, and continued implementation of comprehensive prevention and control of the infection sources and snails.

Key words: Schistosomiasis, Endemic status, Surveillance, Yunnan Province