广州市番禺地区褐云玛瑙螺和福寿螺广州管圆线虫感染情况调查

目的了解广州市番禺地区褐云玛瑙螺和福寿螺广州管圆线虫感染情况。方法用人工胃液消化法对采集到的褐云玛瑙螺和福寿螺进行处理,镜下观察和计数广州管圆线虫第3期幼虫,比较不同地区、不同螺种的感染率和感染度;将螺体内检获的幼虫感染健康SD大鼠并解剖,以验证之前的检查结果。结果共检测褐云玛瑙螺367只,福寿螺357只,其中褐云玛瑙螺广州管圆线虫感染率为22.62%,阳性螺感染度为57.00条/螺;福寿螺感染率为3.08%,阳性螺感染度为1.64条/螺。大岗、石碁、化龙、榄核4镇和南沙区褐云玛瑙螺广州管圆线虫感染率分别为13.33%、15.00%、20.93%、73.68%和8.41%,福寿螺感染率分别为5.88%、2.88%、1.89%、0%和3.96%。结论番禺地区褐云玛瑙螺和福寿螺均存在广州管圆线虫感染,且以褐云玛瑙螺感染较为严重。不同调查区域间螺的感染情况亦存在一定差异。

Investigation on snails Achatina fulica and Pomacea canaliculata infected with Angiostrongylus cantonensis in Panyu region of Guangzhou City

Objective To understand the natural infection status of Angiostrongylus cantonensis in snails Achatina fulica and Pomacea canaliculata from Panyu region of Guangzhou City.Methods The snails Achatina fulica and Pomacea canaliculata captured from the field were digested with the artificial stomach fluid.The third-stage larvae of A.cantonensis were examined and counted under a microscope.The collected third-stage larvae were used to infect SD rats.Results A total of 367 Achatina fulica and 357 Pomacea canaliculata were examined.The infection rate of A.cantonensis in Achatina fulica was 22.62%,with a mean intensity of 57.00 larvae per positive snail.The infection rate of A.cantonensis in Pomacea canaliculata was 3.08%,with a mean intensity of 1.64 larvae per positive snail.The infection rates of A.cantonensis in Achatina fulica from Dagang,Shiqi,Hualong,and Lanhe towns and Nansha District,were 13.33%,15.00%,20.93%,73.68% and 8.41%,respectively.Those in Pomacea canaliculata were 5.88%,2.88%,1.89%,0% and 3.96%,respectively.Conclusions A.cantonensis infection exists in Achatina fulica and Pomacea canaliculata from Panyu region of Guangzhou City,and the infection in Achatina fulica is more serious than that in Pomacea canaliculata.The infection rates of the snails among five sites are different.