2011-2013年四川省并殖吸虫病固定监测结果分析

Surveillance results of paragonimiasis endemic in regular surveillance sites in Sichuan Province from 2011 to 2013

目的了解四川省并殖吸虫病流行状况及影响因素,为防治工作提供依据。方法四川省宣汉县、开江县、彭州市、雅安市雨城区等4县(市、区)各有1个行政村被选为并殖吸虫病固定监测点。对监测点人群并殖吸虫感染情况采用ELISA法进行血清学检测,并进行问卷调查;采集溪蟹进行并殖吸虫囊蚴检测和计数。结果 2011-2013年共血检3 666名当地居民,血检阳性104名,血阳率2.8%;共问卷调查3 671名居民,其中24.8%听说过并殖吸虫病,36.3%有食用未熟溪蟹行为,56.4%有玩溪蟹行为,84.6%有饮溪水的行为。共解剖溪蟹2 463只,其中620只溪蟹检出并殖吸虫囊蚴,感染率为25.2%,感染度为4.53囊蚴/只。结论四川省并殖吸虫流行区自然环境中疫情较重,流行区居民大多有不卫生饮食行为习惯,出现或暴发并殖吸虫病的可能性极大。

Objective To understand the endemic situation and impact factors of paragonimiasis in Sichuan Province,so as to provide the evidence for its control work. Methods Four administrative villages from Xuanhan County,Kaijiang County,Pengzhou City and Yucheng District of Ya＇an City were selected as regular surveillance sites. In the surveillance sites,ELISA was applied to test the infection situation of residents,questionnaire surveys were performed simultaneously;and water crabs were collected to detect the metacercariae of Paragonimus. Results From 2011 to 2013,totally 3 666 residents were tested by serum test and 104 of them were positive with a positive rate of 2.8%. Totally 3 671 residents underwent the questionnaire survey and 24.8% of them had heard about paragonimiasis,36.3% had eaten undercooked water crabs,56.4%had played with water crabs,and 84.6% had drunk stream water. Totally 2 463 water crabs were dissected,and metacercariae of Paragonimus were found in 620 of them with the infection rate of 25.2% and infectiosity of 4.53 per crab,respectively.Conclusions The endemic situation of paragonimiasis in natural environments is serious in Sichuan Province. The residents in endemic area practice unhealthy diet behavior,and there is an urgent risk of the breakout of paragonimiasis.