›› 2009, Vol. 27 ›› Issue (6): 12-512.

• 现场研究 • Previous Articles     Next Articles

The First National Survey on Natural Nidi of Angiostrongylus cantonensis in China

ZHANG Yi1,LV Shan1,YANG Kun1,2,LIU He-xiang1,HU Ling1,LI Li-sha3,DENG Zhuo-hui4,ZHANG Hong-man5,HU Xi-min6,YAO Li-nong7,ZENG Xiao-jun8,LI Zheng-xiang9,CHEN Zhao10,WANG Li-ying10,ZHOU Xiao-nong1 *   

  1. 1 National Institute of Parasitic Diseases，Chinese Center for Disease Control and Prevention，WHO Collaborating Centre for Malaria，Schistosomiasis and Filariasis，Key Laboratory of Parasite and Vector Biology，MOH，Shanghai 200025，China；2 Jiangsu Institute of Parasitic Diseases，Wuxi 214064，China；3 Fujian Center for Disease Control and Prevention，Fuzhou 350001，China；4 Guangdong Center for Disease Control and Prevention，Guangzhou 510300，China；5 Guangxi Center for Disease Control and Prevention，Nanning 530028，China；6 Hainan Center for Disease Control and Prevention，Haikou 570203，China；7 Zhejiang Center for Disease Control and Prevention，Hangzhou 310051，China；8 Jiangxi Institute for Parasitic Diseases，Nanchang 330046，China；9 Hunan Center for Disease Control and Prevention，Changsha 410005，China；10 Ministry of Health of the People′s Republic of China，Beijing 100044，China
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-12-30 Published:2009-12-30

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Abstract: Objective To reveal the natural distribution of Angiostrongylus cantonensis in the mainland of China. Methods The potential areas of A. cantonensis and its main intermediate host Pomacea canaliculata were predicted based on degree-day models using GIS technique. A grid sampling was performed on the prediction map and 5% grids were randomly sampled. A total of 55 sampled sites were selected for the survey on A. cantonensis and its hosts in September-October of 2006. Results Nineteen Provinces/Municipalities/Autonomous Regions were found as potential habitats for P. canaliculata in the mainland of China. It was then confirmed that the snails distributed in the provinces of Fujian, Jiangxi, Zhejiang, Hunan, Guangdong, Guangxi, Hainan, and Yunnan. Higher prevalence of A. cantonensis in P. canaliculata was detected in Jianou of Fujian （36.6%）, Xingguo of Jiangxi （19.9%）, Rui′an of Zhejiang （16.0%）, Rucheng of Hunan （5.0%）, Huazhou of Guangdong（6.3%）, Shangsi of Guangxi （39.1%） and Wuzhishan of Hainan （25.0%）. Conclusion Natural nidi of A. cantonensis have been found in seven provinces where natural infection in P. canaliculata has been detected.

Key words: Angiostrongylus cantonensis, Pomacea canaliculata, Natural nidus, GIS