Aedes albopictus (Diptera: Culicidae) as a potential vector of endemic and exotic arboviruses in Australia
Autor(es): Nicholson J, Ritchie S A, van den Hurk A F
Resumo: In 2005, established populations of Aedes albopictus (Skuse) were discovered in the Torres Strait, the region that separates Papua New Guinea from northern Australia. This increased the potential for this species to be introduced to mainl- Australia. Because it is an arbovirus vector elsewhere, we undertook laboratory-based infection - transmission experiments to determine the potential for Ae. albopictus from the Torres Strait to become infected with - transmit the four major Australian endemic arboviruses--Murray Valley encephalitis virus, West Nile virus Kunjin strain (WNV(KUN)), Ross River virus (RRV), - Barmah Forest virus--as well as the exotic Japanese encephalitis virus. Ae. albopictus is susceptible to infection with all viruses, with infection rates ranging between 8% for WNV(KUN) - 71% for RRV. Transmission rates of approximately 25% were observed for RRV - Barmah Forest virus, but these were < 17% for Murray Valley encephalitis virus, WNV(KUN), - Japanese encephalitis virus. Given its relative vector competence for alphaviruses, we also examined the replication kinetics - extrinsic incubation periods required for transmission of RRV - chikungunya virus. Despite lower body titers, more mosquitoes reared - maintained at 28 degrees C became infected with - transmitted the virus than those reared - maintained at 22 degrees C. The minimum time between Ae. albopictus consuming an infected bloodmeal - transmitting chikungunya virus was 2 d at 28 degrees C - 4 d at 22 degrees C, - for RRV, it was 4 d, irrespective of the temperature. Given its opportunistic feeding habits - aggressive biting behavior, the establishment of Ae. albopictus on the Australian mainl- could have a considerable impact on alphavirus transmission.
Palavras-Chave: Aedes albopictus; Australia; Arbovirus; Infection; Transmission
Imprenta: Journal of Medical Entomology, v. 51, n. 3, p. 661-669, 2014
Identificador do objeto digital: 10.1603/ME13204
Descritores: Chikungunya virus - Arbovirus ; Chikungunya virus - Pathogenesis ; Chikungunya virus - Viral infections ; Chikungunya Virus - Virus ; Chikungunya virus - Transmission ; Chikungunya virus - Epidemiology ; Chikungunya virus - Public health
Data de publicação: 2014
