Autor(es): Mwangangi Joseph M, Midega Janet, Kahindi Samuel, Njoroge Laban, Nzovu Joseph, Githure John, Mbogo Charles M, Beier John C

Resumo: Mosquitoes (Diptera: Culicidae) are important vectors of human disease-causing pathogens. Mosquitoes are found both in rural - urban areas. Deteriorating infrastructure, poor access to health, water - sanitation services, increasing population density, - widespread poverty contribute to conditions that modify the environment, which directly influences the risk of disease within the urban - peri-urban ecosystem. The objective of this study was to evaluate the mosquito vector abundance - diversity in urban, peri-urban, - rural strata in Malindi along the Kenya coast. The study was conducted in the coastal district of Malindi between January - December 2005. Three strata were selected which were described as urban, peri-urban, - rural. Sampling was done during the wet - dry seasons. Sampling in the wet season was done in the months of April - June to cover the long rainy season - in November - December to cover the short rainy season, while the dry season was between January - March - September - October. Adult mosquito collection was done using Pyrethrum Spray Collection (PSC) - Centers for Disease Control - Prevention (CDC) light traps inside houses - specimens were identified morphologically. In the three strata (urban, peri-urban, - rural), 78.5% of the total mosquito (n = 7,775) were collected using PSC while 18.1% (n = 1,795) were collected using the CDC light traps. Using oviposition traps, mosquito eggs were collected - reared in the insectary which yielded 329 adults of which 83.8% (n = 276) were Aedes aegypti - 16.2% (n = 53) were Culex quinquefasciatus. The mosquito distribution in the three sites varied significantly in each collection site. Anopheles gambiae, Anopheles funestus - Anopheles coustani were predominant in the rural stratum while C. quinquefasciatus was mostly found in urban - peri-urban strata. However, using PSC - CDC light trap collection techniques, A. aegypti was only found in urban strata. In the three strata, mosquitoes were mainly found in high numbers during the wet season. Further, A. gambiae, C. quinquefasciatus, - A. aegypti mosquitoes were found occurring together inside the houses. This in turn exposes the inhabitants to an array of mosquito-borne diseases including malaria, bancroftian filariasis, - arboviruses (dengue fever, Yellow fever, Rift Valley fever, Chikungunya fever, - West Nile Virus). In conclusion, our findings provide useful information for the design of integrated mosquito - disease control programs in East African environments.

Imprenta: Parasitology Research, v. 110, n. 1, p. 61-71, 2012

Identificador do objeto digital: 10.1007/s00436-011-2449-6

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

Data de publicação: 2012

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