Autor(es): Li Yiji, Kamara Fatmata, Zhou Guofa, Puthiyakunnon Santhosh, Li Chunyuan, Liu Yanxia, Zhou Yanhe, Yao Lijie, Yan Guiyun, Chen Xiao-Guang

Resumo: Aedes albopictus is a very invasive - aggressive insect vector that causes outbreaks of dengue fever, chikungunya disease, - yellow fever in many countries. Vector ecology - disease epidemiology are strongly affected by environmental changes. Urbanization is a worldwide trend - is one of the most ecologically modifying phenomena. The purpose of this study is to determine how environmental changes due to urbanization affect the ecology of Aedes albopictus. Aquatic habitats - Aedes albopictus larval population surveys were conducted from May to November 2013 in three areas representing rural, suburban, - urban settings in Guangzhou, China. Ae. albopictus adults were collected monthly using BG-Sentinel traps. Ae. albopictus larva - adult life-table experiments were conducted with 20 replicates in each of the three study areas. The urban area had the highest - the rural area had the lowest number of aquatic habitats that tested positive for Ae. albopictus larvae. Densities in the larval stages varied among the areas, but the urban area had almost two-fold higher densities in pupae - three-fold higher in adult populations compared with the suburban - rural areas. Larvae developed faster - the adult emergence rate was higher in the urban area than in suburban - rural areas. The survival time of adult mosquitoes was also longer in the urban area than it was in suburban - rural areas. Study regions, surface area, water depth, water clearance, surface type, - canopy coverage were important factors associated with the presence of Ae. albopictus larvae. Urbanization substantially increased the density, larval development rate, - adult survival time of Ae. albopictus, which in turn potentially increased the vector capacity, - therefore, disease transmissibility. Mosquito ecology - its correlation with dengue virus transmission should be compared in different environmental settings.

Imprenta: PLoS Neglected Tropical Diseases, v. 8, n. 11, p. e3301, 2014

Identificador do objeto digital: 10.1371/journal.pntd.0003301

Descritores: Chikungunya virus - Infectious diseases ; Chikungunya virus - Viral infections ; Chikungunya Virus - Virus ; Chikungunya virus - Transmission ; Chikungunya virus - Chikungunya fever ; Chikungunya virus - Dengue ; Chikungunya virus - Epidemiology ; Chikungunya virus - Public health

Data de publicação: 2014

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