Autor(es): Vanlandingham, D. L.; McGee, C. E.; Klinger, K. A.; Vessey, N.; Fredregillo, C.; Higgs, S.

Resumo: Three species of mosquitoes (Culex pipiens quinquefasciatus, Aedes aegypti, and Ae. albopictus) collected in Texas were compared with respect to their relative susceptibility to infection with West Nile virus (WNV) strain 114. Oral infection and dissemination rates were 73% infected with 86% dissemination for Ae. aegypti, 13% infected with 100% dissemination for Ae. albopictus, and 100% infected and disseminated for Cx. p. quinquefasciatus. The oral infectious dose required to establish a 50% infection rate was also determined. All feral mosquito species were found to be susceptible to oral infection with WNV (114) in a similar range: Ae. aegypti (6.37 log sub(10) 50% tissue culture infectious doses [TCID sub(50)]/5 mu L), Ae. albopictus (6.17 log sub(10) TCID sub(50)/5 mu L), and Cx. p. quinquefasciatus (5.33 log sub(10) TCID sub(50)/5 mu L). These data demonstrate that both Ae. aegypti and Ae. albopictus from Texas are susceptible to infection with WNV at a similar range to Cx. p. quinquefasciatus and may represent a threat of WNV transmission to humans because of host preferences.

Palavras-Chave: Viral diseases; Pest control; Tissue culture; Host preferences; Aquatic insects; Public health; Oral infection; Aedes aegypti; Culex pipiens quinquefasciatus; West Nile virus

Imprenta: American Journal of Tropical Medicine and Hygiene, v. 77, n. 5, p. 925-928, 2007.

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

Data de publicação: 2007