title: Natural enzootic vectors of Venezuelan equine encephalitis virus, Magdalena Valley, Colombia.
abstract: To characterize the transmission cycle of enzootic Venezuelan equine encephalitis virus (VEEV) strains believed to represent an epizootic progenitor, we identified natural vectors in a sylvatic focus in the middle Magdalena Valley of Colombia. Hamster-baited traps were placed into an active forest focus, and mosquitoes collected from each trap in which a hamster became infected were sorted by species and assayed for virus. In 18 cases, a single, initial, high-titered mosquito pool representing the vector species was identified. These vectors included Culex (Melanoconion) vomerifer (11 transmission events), Cx. (Mel.) pedroi (5 transmissions) and Cx. (Mel.) adamesi (2 transmissions). These results extend the number of proven enzootic VEEV vectors to 7, all of which are members of the Spissipes section of the subgenus Melanoconion. Our findings contrast with previous studies, which have indicated that a single species usually serves as the principal enzootic VEEV vector at a given location.
authors.affiliation: Instituto Nacional de Salud, Bogota, Colombia.
authors.forename: Cristina
authors.initials: C
authors.lastname: Ferro
authors.forename: Jorge
authors.initials: J
authors.lastname: Boshell
authors.forename: Abelardo C
authors.initials: AC
authors.lastname: Moncayo
authors.forename: Marta
authors.initials: M
authors.lastname: Gonzalez
authors.forename: Marta L
authors.initials: ML
authors.lastname: Ahumada
authors.forename: Wenli
authors.initials: W
authors.lastname: Kang
authors.forename: Scott C
authors.initials: SC
authors.lastname: Weaver
mesh_terms: D000818:Animals; D003105:Colombia; D006224:Cricetinae; D003465:Culex / Q000145:classification / Q000821:virology*; D004666:Encephalitis Virus, Venezuelan Equine / Q000502:physiology*; D004685:Encephalomyelitis, Venezuelan Equine / Q000635:transmission* / Q000821:virology; D007303:Insect Vectors / Q000145:classification / Q000821:virology*