1.Center for Disease Control and Prevention of Longhai City, Longhai 363100, China; 2. Fujian Center for Disease Control and Prevention, Fuzhou 350001, China; 3. Institute of Parasitic Disease, Chinese Center for Disease Control and Prevention, Shanghai 200025, China 4. Zhengxing Hospital Zhangzhou,, Zhangzhou 363000, China
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 Achatina snails. Factors related to the environment and influence of shellfish hosts were also included. Results showed that 8 species 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 9 townships. The infection rate was 19.78% in average. The infection rate in V. alte was 56.63% (47/83); the infection rates for A. fulica and 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.cantonensis larvae 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. fulica infected with A. cantonensist.
林国华，黄明松，程由注，郑瑞丹，颜翠兰，陈韶红，方彦炎，林绍兴，周耀雄. 福建省龙海市广州管圆线虫贝类宿主种群生态及感染率调查研究[J]. 中国人兽共患病学报, 2014, 30(8): 821-827.
LIN Guo-hua,HUANG Ming-song,CHENG You-zhu,ZHENG Rui-dan, CHEN Shao-hong,YAN Cui-lan,FANG Yan-yan,LIN Shao-xing,ZHOU Yao-xiong. Population ecology of medical shellfish and the infection rate of Angiostrongylus cantonensis in Longhai City, Fujian Province, China. Chinese Journal of Zoonoses, 2014, 30(8): 821-827.
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