深圳市食用螺广州管圆线虫自然感染调查

Survey of natural infectious status of Angiostrongylus cantonensis in edible snails in Shenzhen City

目的了解深圳市市场流通的食用螺广州管圆线虫自然感染情况。方法从深圳市区流通市场随机抽取6个种属258份食用螺样品,对其进行人工消化处理后镜检分离广州管圆线虫感染期幼虫,并计算感染率和感染强度。结果在6个种属的258份食用螺中,仅福寿螺和东风螺检出阳性,自然感染率分别为40·7%和37·8%,平均感染强度为32·53条/只。结论深圳市食用螺流通市场存在着广州管圆线虫的流行因素,中间宿主以福寿螺和东风螺为主。

Objective To understand the natural infectious status of Angiostrongylus cantonensis in edible snail sampled from market in Shenzhen. Methods 258 snarl sample of 6 species were digested by false gastric juice and Angiostrongylus cantonensis grub were separated and detected under microscope. The natural infection rate and infectious intention were calculated. Results Among the 6 species of snail samples, Angiostrongylus cantonensis was only found in Pila gigas and Babyloni areolata with the natural infection rate of 40.7% and 37.7% respectively. Average infectiosity was 32.53 grub per snail. Conclusion It is possible that Angiostrongylus cantonensis be epidemic in Shenzhen through edible snail, especially through the intermediate host of Pila gigas and Babyloni areolata.