Spatial distribution and habitat suitability of Biomphalaria straminea,intermediate host of Schistosoma mansoni,in Guangdong,China  

作　　者：Ya Yang Shao-Yu Huang Fu-Quan Pei Yue Chen Qing-Wu Jiang Zhuo-Hui Deng Yi-Biao Zhou 

机构地区：[1]Key Laboratory of Public Health Safety,Ministry of Education,Tropical Disease Research Center,Department of Epidemiology,School of Public Health,Fudan University,Shanghai,China [2]Guangdong Provincial Center for Disease Control and Prevention,WHO Collaborating Centre for Surveillance,Research and Training of Emerging Infectious Diseases,Guangzhou,Guangdong,China [3]School of Epidemiology and Public Health,Faculty of Medicine,University of Ottawa,Ottawa,Canada

出　　处：《Infectious Diseases of Poverty》2018年第1期1153-1162,共10页贫困所致传染病（英文）

基　　金：This work was supported by the National Research and Development Plan of China(No.2016YFC1200500).

摘　　要：Background:Biomphalaria straminea is an invasive vector in China,posing a significant threat to public health.Understanding the factors affecting the establishment of this snail is crucial to improve our ability to manage its dispersal and potential risk of schistosomiasis transmission.This study sought to determine the spatial distribution of B.straminea in China's Mainland and whether environmental factors were divergent between places with and without B.straminea.Methods:A malacological survey of B.straminea was conducted in Guangdong Province,China.Snails were identified using anatomical keys.Water and sediment samples were taken,and their physicochemical properties were analyzed using national standard methods.Landscape and climatic variables were also collected for each site.We compared the environmental characteristics between sites with and without B.straminea using Mann-Whitney U test.We further used generalized linear mixed models to account for seasonal effects.Results:B.straminea was found at six sites,including one in Dongguan and five in Shenzhen.Probability map found a hot spot of B.straminea distribution at Shenzhen and Hong Kong.Sites occupied by B.straminea were characterized by higher median altitude,mean annual precipitation and moderate temperature.Water with snails had higher median concentrations of total nitrogen,nitrate and nitrites,ammoniacal nitrogen,calcium,zinc and manganese but lower dissolved oxygen and magnesium.Sediments with snails had higher median copper,zinc and manganese.B.straminea was associated with maximum temperature of the warmest month(pMCMC<0.001)and sediment zinc(pMCMC<0.001).Conclusions:B.straminea is distributed in Shenzhen and its surrounding areas in Guangdong,China.Sites with and without B.straminea differed in the maximum temperature of the warmest month and sediment zinc.Surveillance should be continued to monitor the dispersal of this snail in China.

关 键 词：Biomphalaria straminea DISTRIBUTION Environmental factor GUANGDONG China 

分 类 号：F42[经济管理—产业经济]