Density of Aedes aegypti (Diptera: Culicidae) in a low-income Brazilian urban community where dengue, Zika, and chikungunya viruses co-circulate

dc.creatorSouza, Raquel L.
dc.creatorNazaré, Romero J.
dc.creatorArgibay, Hernan D.
dc.creatorPellizzaro, Maysa
dc.creatorAnjos, Rosângela O.
dc.creatorPortilho, Moyra M.
dc.creatorNascimento, Leile Camila Jacob
dc.creatorReis, Mitermayer Galvão
dc.creatorKitron, Uriel D.
dc.creatorRibeiro, Guilherme S.
dc.date2023-06-15T19:08:44Z
dc.date2023-06-15T19:08:44Z
dc.date2023
dc.date.accessioned2023-09-26T20:44:50Z
dc.date.available2023-09-26T20:44:50Z
dc.identifierSOUZA, Raquel L. et al. Density of Aedes aegypti (Diptera: Culicidae) in a low-income Brazilian urban community where dengue, Zika, and chikungunya viruses co-circulate. Parasites and Vectors, v. 16, n. 159, p. 1-15 2023.
dc.identifier1756-3305
dc.identifierhttps://www.arca.fiocruz.br/handle/icict/59049
dc.identifier10.1186/s13071-023-05766-5
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8863139
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq). Fundação de Amparo à Pesquisa do Estado da Bahia (FAPESB). Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES ). Ministério da Educação do Brasil. Departamento de Ciência e Tecnologia, Secretaria de Ciência, Tecnologia e Insumos Estratégicos. Universidade Federal da Bahia (UFBA). Fundação Oswaldo Cruz (FIOCRUZ).
dc.descriptionBackground: Low-income urban communities in the tropics often lack sanitary infrastructure and are overcrowded, favoring Aedes aegypti proliferation and arboviral transmission. However, as Ae. aegypti density is not spatially homogeneous, understanding the role of specific environmental characteristics in determining vector distribution is critical for planning control interventions. The objectives of this study were to identify the main habitat types for Ae. Aegypti, assess their spatial densities to identify major hotspots of arbovirus transmission over time and investigate underlying factors in a low-income urban community in Salvador, Brazil. We also tested the field-collected mosquitoes for arboviruses. Methods: A series of four entomological and socio-environmental surveys was conducted in a random sample of 149 households and their surroundings between September 2019 and April 2021. The surveys included searching for potential breeding sites (water-containing habitats) and for Ae. aegypti immatures in them, capturing adult mosquitoes and installing ovitraps. The spatial distribution of Ae. aegypti density indices were plotted using kernel density-ratio maps, and the spatial autocorrelation was assessed for each index. Visual differences on the spatial distribution of the Ae. aegypti hotspots were compared over time. The association of entomological findings with socio-ecological characteristics was examined. Pools of female Ae. aegypti were tested for dengue, Zika and chikungunya virus infection. Results: Overall, 316 potential breeding sites were found within the study households and 186 in the surrounding public spaces. Of these, 18 (5.7%) and 7 (3.7%) harbored a total of 595 and 283 Ae. aegypti immatures, respectively. The most productive breeding sites were water storage containers within the households and puddles and waste materials in public areas. Potential breeding sites without cover, surrounded by vegetation and containing organic matter were significantly associated with the presence of immatures, as were households that had water storage containers. None of the entomological indices, whether based on immatures, eggs or adults, detected a consistent pattern of vector clustering in the same areas over time. All the mosquito pools were negative for the tested arboviruses. Conclusions: This low-income community displayed high diversity of Ae. aegypti habitats and a high degree of heterogeneity of vector abundance in both space and time, a scenario that likely reflects other low-income communities. Improving basic sanitation in low-income urban communities through the regular water supply, proper management of solid wastes and drainage may reduce water storage and the formation of puddles, minimizing opportunities for Ae. aegypti proliferation in such settings.
dc.formatapplication/pdf
dc.languageeng
dc.publisherBMC
dc.rightsopen access
dc.subjectAedes aegypti
dc.subjectIndicadores ambientais
dc.subjectMonitoramento ambiental
dc.subjectControle de mosquitos
dc.subjectMosquitos vetores
dc.subjectDoenças transmitidas por mosquitos
dc.subjectFatores socioeconômicos
dc.subjectAbastecimento de água
dc.subjectAedes aegypti
dc.subjectEnvironmental indicators
dc.subjectEnvironmental monitoring
dc.subjectMosquito control
dc.subjectMosquito vectors
dc.subjectMosquito-borne diseases
dc.subjectSocioeconomic factors
dc.subjectWater supply
dc.subjectAedes
dc.subjectIndicadores ambientais
dc.subjectMonitoramento ambiental
dc.subjectControle de mosquitos
dc.subjectDoenças transmitidas por vetores
dc.subjectFatores socioeconômicos
dc.subjectAbastecimento de água
dc.titleDensity of Aedes aegypti (Diptera: Culicidae) in a low-income Brazilian urban community where dengue, Zika, and chikungunya viruses co-circulate
dc.typeArticle


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