Comparative role of Aedes albopictus and Aedes aegypti in the emergence of Dengue and Chikungunya in central Africa
Autor(es): Paupy Christophe, Ollomo Benjamin, Kamgang Basile, Moutailler Sara, Rousset Dominique, Demanou Maurice, Hervé Jean-Pierre, Leroy Eric, Simard Frédéric
Resumo: Since its discovery in Nigeria in 1991, Aedes albopictus has invaded much of Central Africa, a region where Ae. aegypti also occurs. To assess the relationship between the invasion by Ae. albopictus - the recent emergence of dengue virus (DENV) - chikungunya virus (CHIKV), we undertook vector competence experiments on populations collected from Cameroon - conducted field investigations during concurrent epidemics of DENV - CHIKV in Gabon. Overall, infection - dissemination rates were not significantly different between Ae. albopictus - Ae. aegypti when exposed to titers of 10(8.1) mosquito infectious dose 50/mL - 10(7.5) plaque forming units/mL of DENV type 2 - CHIKV, respectively. Field investigations showed that Ae. albopictus readily bit man, was abundant, - outnumbered Ae. aegypti to a large extent in Gabon, particularly in suburban environments. Nevertheless, Ae. aegypti was predominant in the more urbanized central parts of Libreville. In this city, CHIKV - DENV were detected only in Ae. albopictus. These data strongly suggest that Ae. albopictus acted as the major vector of both viruses in Libreville in 2007, impacting on the epidemiology of DENV - CHIKV in this area.
Imprenta: Vector Borne and Zoonotic Diseases, v. 10, n. 3, p. 259-266, 2010
Identificador do objeto digital: 10.1089/vbz.2009.0005
Descritores: Chikungunya virus - Flaviviridae ; Chikungunya virus - Pathogenesis ; Chikungunya virus - Infectious diseases ; Chikungunya virus - Viral infections ; Chikungunya Virus - Virus ; Chikungunya virus - Transmission ; Chikungunya virus - Dengue ; Chikungunya virus - Epidemic ; Chikungunya virus - Epidemiology
Data de publicação: 2010
