First report of Aedes aegypti rransmission of Chikungunya virus in the Americas

Autor(es): Díaz-González Esteban E, Kautz Tiffany F, Dorantes-Delgado Alicia, Malo-García Iliana R, Laguna-Aguilar Maricela, Langsjoen Rose M, Chen Rubing, Auguste Dawn I, Sánchez-Casas Rosa M, Danis-Lozano Rogelio, Weaver Scott C, Fernández-Salas Ildefonso


Resumo: During a chikungunya fever outbreak in late 2014 in Chiapas, Mexico, entomovirological surveillance was performed to incriminate the vector(s). In neighborhoods, 75 households with suspected cases were sampled for mosquitoes, of which 80% (60) harbored Aedes aegypti - 2.7% (2) Aedes albopictus. A total of 1,170 Ae. aegypti - three Ae. albopictus was collected - 81 pools were generated. Although none of the Ae. albopictus pools were chikungunya virus (CHIKV)-positive, 18 Ae. aegypti pools (22.8%) contained CHIKV, yielding an infection rate of 32.3/1,000 mosquitoes. A lack of herd immunity in conjunction with high mosquito populations, poor vector control services in this region, - targeted collections in locations of human cases may explain the high infection rate in this vector. Consistent with predictions from experimental studies, Ae. aegypti appears to be the principal vector of CHIKV in southern Mexico, while the role of Ae. albopictus remains unknown.


Imprenta: The American Journal of Tropical Medicine and Hygiene, v. 93, n. 6, p. 1325-1329, 2015


Identificador do objeto digital: 10.4269/ajtmh.15-0450


Descritores: Chikungunya Virus - Virus ; Chikungunya virus - Transmission ; Chikungunya virus - Chikungunya fever


Data de publicação: 2015