【摘要】 目的调查龙海市医学贝类种群及其广州管圆线虫感染率。方法按不同类型孳生地设调查点,采集水生和陆生贝类。用肺检法检查大瓶螺肺囊,其他贝类用捣碎匀浆法,检查广州管圆线虫Ⅲ期幼虫。比较匀浆法和肺检法在褐云玛瑙螺体组织的检查效果。调查影响贝类感染率的生态环境因素。结果调查9个乡镇27个调查点1 673份标本,查出大瓶螺、石环棱螺、铜锈环棱螺、瘤拟黑螺、褐云玛瑙螺、高突足襞蛞蝓、双线嗜粘液蛞蝓和同型巴蜗牛等8种贝类,广州管圆线虫总感染率为19.78%。其中高突足襞蛞蝓最高,达56.63%(47/83),褐云玛瑙螺和大瓶螺分别为39.32%(92/234)与27.14%(130/234)。各调查点感染率高低与其距离居民生活区远近密切相关。首次在瘤拟黑螺内检及广州管圆线虫幼虫。肺检法和匀浆法的检出率分别为87.1%与100.0%,两者差异有统计学意义。结论高突足襞蛞蝓、褐云玛瑙螺和大瓶螺为当地感染广州管圆线虫优势种群,感染率同各种贝类的微生态环境关系密切。瘤拟黑螺充当广州管圆线虫新宿主。肺检法不适合用于褐云玛瑙螺的的广州管圆线虫感染定性筛查。更多还原

【Abstract】 The aim of the study was to investigate the population ecology of medical shellfish and the infection of Angiostrongylus cantonensis in Longhai,Fujian Province,China.Aquatic and terrestrial shellfish were collected in survey points according to different types of breeding grounds.Then,lung-microscopy method was involved in the detection of the lung tissue in Ampullaria gigas.Other shellfishes were mashed to detect the third-stage larvae of Angiostrongylus cantonensis.Homogenization and lung microscopy were compared in the detection of the larvae of A.cantonensis in Achatinasnails.Factors related to the environment and influence of shellfish hosts were also included.Results showed that 8species of molluscans were found,including Pila gigas,Bellamya aeruginosa,Bellamya lithophaga,Melanoides tuberculata,Achatina fulica,Vaginulus alte,Philomycus bilineatus,and Bradybaena similaris with 1 673 specimens in 27 survey points from 9townships.The infection rate was 19.78%in average.The infection rate in V.alte was 56.63%(47/83);the infection rates for A.fulicaand P.gigas were 39.32%(92/234)and 27.14%(130/234),respectively.The infection rate of each survey point was closely related to the distances from the residents living area.Morever,A.cantonensislarvae were detected in M.tuberculata.Lung microscopy and homogenization method detection rate was 87.1%and 100.0%,respectively.The difference was statistically significant.In conclusion,V.alte,A.fulica and P.gigas were A.cantonensist infection dominant population.The infection rate was closely related to micro-ecological environment for all kinds of shellfish.M.tuberculata was the new host of A.cantonensis.Lung microscopy method should not be used in the qualitative screening detection of A.fulicainfected with A.cantonensist.更多还原