贵阳市食品流通市场广州管圆线虫中间宿主感染调查

Survey of infections status of Angiostrongylus cantonensis in intermediate host in Guiyang city

目的了解贵阳市流通及餐饮市场广州管圆线虫主要中间宿主的感染状况。方法从贵阳市水产批发市场及夜市大排档中随机采集褐云玛瑙螺和福寿螺,用肺检法结合酶消化法检测分离广州管圆线虫3期幼虫。结果在水产批发市场和夜市大排档抽样检测褐云玛瑙螺和福寿螺均检出广州管圆线虫3期幼虫,其中褐云玛瑙螺的感染率较福寿螺高。市场褐云玛瑙螺、福寿螺平均感染率分别为3.08%和1.59%;夜市大排档褐云玛瑙螺、福寿螺平均感染率分别为19.75%和0.71%。贵阳市市场所售褐云玛瑙螺和福寿螺均来源于省外。结论贵阳市流通及餐饮市场存在着广州管圆线虫病流行的危险因素,应加强食品流通中的卫生监测及公众的健康教育。

Objective Understand the infection status of Angiostrongylus cantonensis in main intermediate host sampled from market and restaurant in Guiyang. Methods Pornacea canaliculata and Achatina fulica were collected randomly from fishery free market and snacks at night market, and the third-stage larva of A. cantonensis were separated and detected with lung-microscopy and enzyme digestion. Results The third-stage larva of A. cantonensis of snail samples were found, and the infections rate of A. fulica was higher than P. canaliculata. In market, the average infections rate of A. fulica and P. canaliczdata were 3.08% and 1.59% respectively. While in snacks at night market, the average infections rate of A. fulica and P. canaliculata were 19.75% and 0.71%. Saled snail in Guiyang market came from other province. Conclusion There were risk factors of A. cantonensis prevalence in market and restaurant of Guiyang. It should strengthen market management, food-safety inspection, and health education in public.