Larval temperature-food effects on adult mosquito infection and vertical transmission of dengue-1 virus
Autor(es): Buckner Eva A, Alto Barry W, Lounibos L Philip
Resumo: Temperature-food interactions in the larval environment can affect life history - population growth of container mosquitoes Aedes aegypti (L.) - Aedes albopictus Skuse, the primary vectors of chikungunya - dengue viruses. We used Ae. aegypti, Ae. albopictus, - dengue-1 virus (DENV-1) from Florida to investigate whether larval rearing temperature can alter the effects of larval food levels on Ae. aegypti - Ae. albopictus life history - DENV-1 infection - vertical transmission. Although we found no effect of larval treatments on survivorship to adulthood, DENV-1 titer, or DENV-1 vertical transmission, rates of vertical transmission up to 16-24% were observed in Ae. albopictus - Ae. aegypti, which may contribute to maintenance of this virus in nature. Larval treatments had no effect on number of progeny - DENV-1 infection in Ae. aegypti, but the interaction between temperature - food affected number of progeny - DENV-1 infection of the female Ae. albopictus parent. The cooler temperature (24°C) yielded the most progeny - this effect was accentuated by high food relative to the other conditions. Low - high food led to the highest (?90%) - lowest (?65%) parental infection at the cooler temperature, respectively, whereas intermediate infection rates (?75-80%) were observed for all food conditions at the elevated temperature. These results suggest that temperature - food availability have minimal influence on rate of vertical transmission - a stronger influence on adults of Ae. albopictus than of Ae. aegypti, which could have consequences for dengue virus epidemiology.
Palavras-Chave: Dengue; Infection; Larval ecology; Transmission
Imprenta: Journal of Medical Entomology, v. 53, n. 1, p. 91-98, 2016
Identificador do objeto digital: 10.1093/jme/tjv145
Descritores: Chikungunya Virus - Virus ; Chikungunya virus - Transmission ; Chikungunya virus - Dengue ; Chikungunya virus - Epidemiology
Data de publicação: 2016
