Autor(es): Westbrook, C. J.; Reiskind, M. H.; Pesko, K. N.; Greene, K. E.; Lounibos, L. P.

Resumo: A key feature in the recent widespread epidemic of the mosquito-borne alphavirus chikungunya virus (CHIKV) was the important role of Aedes albopictus, formerly regarded as a secondary vector, compared to the presumed primary vector Aedes aegypti. Ae. albopictus, a container-inhabiting mosquito, is an invasive species that occurs over a wide geographic range spanning tropical and temperate latitudes. In this study we examine the effects of a broad range of larval rearing temperatures on CHIKV infection, dissemination, and viral titer in Florida F sub(1) Ae. albopictus. Adults from larvae reared at 18C, 24C, and 32C differed significantly in size, development time, and CHIKV infection rate. Adult females with the largest body size were produced from the coolest temperature, took the longest to mature, and six times more likely to be infected with CHIKV than females reared at 32C. There was also a significant effect of rearing temperature on viral dissemination, resulting in an increase in population dissemination at the coolest temperature. This study indicates that climate factors, such as temperature, experienced at the larval stage, can influence the competence of adult females to vector arboviruses.

Palavras-Chave: Temperature effects; Public health; Disease transmission; Epidemics; Body temperature; Climate; Vectors; Development; Introduced species; Infection; Aedes aegypti;Chikungunya virus; Culicidae; Alphavirus; Diptera; Aedes albopictus

Imprenta: Vector Borne and Zoonotic Diseases, v. 10, n. 3, p. 241-247, 2010.

Descritores: Aedes aegypti - Viral infections ; Aedes aegypti - Virus ; Aedes aegypti - Transmission ; Aedes aegypti - Epidemic ; Aedes aegypti - Public health

Data de publicação: 2010

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