Abstract
Sound knowledge of the local distribution and diversity of freshwater snail intermediate hosts and the factors driving the occurrence and abundance of them is crucial to understanding snail-borne parasitic disease transmission and to setting up effective interventions in endemic areas. In this study, we investigated the freshwater snails, water quality parameters, physical characteristics of habitats, predators and competitors, and human activity variables at 102 sites during December 2018 and August 2019 in Shenzhen and adjacent areas in China. We used decision tree models and canonical correspondence analysis to identify the main environmental and biotic factors affecting the occurrence and abundance of snail species. A total of nine species of snail were collected throughout the study area, with Biomphalaria straminea, Sinotaia quadrata, and Physella acuta being the most predominant species. Our study showed that the most important variables affecting the abundance and occurrence of snail species were the presence of predators and competitors, macrophyte cover, chlorophyll-a, substrate type, river depth, and water velocity. In terms of human activities, snail species occurred more frequently and in larger numbers in water bodies affected by human disturbances, especially for sewage discharge, which may reduce the occurrence and abundance of snail predators and competitors. These findings suggest that proper management of water bodies to reduce water pollution may increase the abundance of snail predators and competitors, and should be considered in integrated snail control strategies in the study area.
Funder
the Open Foundation of Key Laboratory of Parasite and Vector Biology, Ministry of Health
the National Natural Science Foundation of China
the National Key Research and Development Program of China
Subject
Infectious Diseases,Public Health, Environmental and Occupational Health,General Immunology and Microbiology
Reference96 articles.
1. Global diversity of gastropods (Gastropoda; Mollusca) in freshwater;Balian;Freshwater Animal Diversity Assessment,2007
2. Swimmer’s itch: Etiology, impact, and risk factors in Europe;Selbach;Trends Parasitol.,2013
3. Snail-borne parasitic diseases: An update on global epidemiological distribution, transmission interruption and control methods;Lu;Infect. Dis. Poverty,2018
4. Schistosomiasis elimination: Lessons from the past guide the future;Gray;Lancet Infect. Dis.,2010
5. Advances in the characteristics of Schistosomiasis infection and its immunopathological mechanism;Wang;J. Microbiol.,2020
Cited by
3 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献