浙江省嘉兴市血吸虫病流行传播阻断后疫情监测分析

目的 分析浙江省嘉兴市1995-2005年血吸虫病流行传播阻断后疫情监测结果,了解本地区血吸虫病流行潜在趋势,为水网型血吸虫病监测提供科学依据.方法 收集、整理、统计、分析1995年以来全市血吸虫病疫情监测资料.结果 钉螺监测:11年累计查螺面积115 695 590m2,从1996年起在5县(市)区内连续10年查出143有螺点,有螺面积497 590 m2,解剖镜检活螺45 735只,未发现感染性钉螺.传染源监测:11年累计血清免疫学查病752 211人,阳性18 034人,阳性者做粪检9485人,均为阴性;疑似患者血检6921人,阳性者做粪检1189人,结果3例阳性(急性血吸病虫2例、慢性血吸病虫1例),均为外来疫区流动人员.结论 血吸病虫防治成果巩固,但螺情回升,外来输入传染源存在,应警惕局部流行的危险性.应重点做好螺情和外来疫区流动人员的监测工作.

Epidemic surveillance of schistosomiasis after blocking its transmission in Jiaxing

objective The study was designed to analyze the results of epidemic surveillance on schis- tosomiasis from 1995 to 2005 in Jiaxing after its epidemic transmission was blocked and to find out the potential epidemic tendency of schistosomiasis in the region for providing scientific evidence for the surveillance on schistosomiasis.Methods Surveillance data on schistosomiasis from 1995 to 2005 in Jiaxing were collected and statistically analyzed.Results An accumulative area of 115 695 590 m~2 was examined for oncomelania in the 11 years.143 snail sites with an area of 497 590 m~2 were reexamined in 5 counties/cities for 10 consecutive years beginning from 1996,and 45 735 alive snails were dis- sected under microscope with no infected snails found.Seroimmunologic tests were conducted for a total of 752 211 patients in the 11 years.There were 18 034 positive patients found,of whom 9485 cases had negative stool tests.Seroimmunologic tests were done for 6921 suspected cases and positive results found in 1189 cases,for whom stool tests were done and 3 of them including 2 acute and 1 chronic schistosomiasis cases were positive.The 3 cases were all of floating population from outside epidemic ar- eas.Conclusion The achievements of schistosomiasis control and prevention has been consolidated. However,the mildly rebounding snail situation and the existing input infection sources indicate a risk of local prevalence.Thus,the surveillance on snail situation and floating population from outside epidemic areas should be emphasized.