关键词: 血吸虫病, 钉螺, 疫情, 监测, 防治效果

Abstract: Objective     To understand the epidemic situation of schistosomiasis in Jiangdu District of Yangzhou City, so as to provide scientific basis for prevention and control of schistosomiasis in following work. Methods     The data on the snail, population, livestock and sentinel rat infection were collected in Jiangdu area from 2016 to 2020, and analyzed for the changes of schistosomiasis prevalence. Results     From 2016 to 2020, a total of 17 042.85 hm² were surveyed on the snails status in Jiangdu District, where snails area were 14.54-88.82 hm2. The occurrence rate in a typical frame with live snails was between 9.90% and 14.64%, with an average density of 0.17-0.61 snails/0.11 m². Dissection of 20 698 snails showed no infection. Totally, 90 335 people underwent serological tests, which showed positive rate between 0.10% and 0.66%, with average positive rate of 0.40%. The average positive rate by blood test was higher in floating population than those in permanent residents, the difference was statistically significant（χ²=145.711, P<0.05）.Serological examination also showed that permanent residents had higher average positive rate than those of outpatients, with statistical difference（χ²＝13.721, P＜0.05）. No schistosomiasis infection was found in a total of 12 397 people received examination of feces, and in a total of 4 048 livestock undergone serological tests. Conclusion     Epidemic situation of schistosomiasis remained relatively stable during the 13th Five-Year Plan period in Jiangdu area. The findings suggest that our efforts are remarkable, though the risk of schistosomiasis transmission still exists. Following tasks should involve continuous implementation of comprehensive control measures as well as improvement of monitoring and early warning strategies.

Key words: Schistosomiasis, Oncomelania, Endemic situation, Monitoring, Control effect