Autor(es)Long Kanya C; Ziegler Sarah A; Thangamani Saravanan; Hausser Nicole L; Kochel Tadeusz J; Higgs Stephen; Tesh Robert B

ResumoOutbreaks of Mayaro fever have been associated with a sylvatic cycle of Mayaro virus (MAYV) transmission in South America. To evaluate the potential for a common urban mosquito to transmit MAYV, laboratory vector competence studies were performed with Aedes aegypti from Iquitos, Peru. Oral infection in Ae. aegypti ranged from 0% (0/31) to 84% (31/37), with blood meal virus titers between 3.4 log(10) and 7.3 log(10) plaque-forming units (PFU)/mL. Transmission of MAYV by 70% (21/30) of infected mosquitoes was shown by saliva collection and exposure to suckling mice. Amount of viral RNA in febrile humans, determined by real-time polymerase chain reaction, ranged from 2.7 to 5.3 log(10) PFU equivalents/mL. Oral susceptibility of Ae. aegypti to MAYV at titers encountered in viremic humans may limit opportunities to initiate an urban cycle; however, transmission of MAYV by Ae. aegypti shows the vector competence of this species and suggests potential for urban transmission.

ImprentaThe American Journal of Tropical Medicine and Hygiene, v. 85, n. 4, p. 750-757, 2011

DescritoresAedes aegypti - Pathogenesis ; Aedes aegypti - RNA ; Aedes aegypti - Viral infections ; Aedes aegypti - Real Time PCR ; Aedes aegypti - virus ; Aedes aegypti - Transmission ; Aedes aegypti - Epidemiology ; Aedes aegypti - Immunology ; Aedes aegypti - Public health

Data de Publicação:2011