Surveillance for mosquito-borne viruses was expanded during 2003 at four differing biomes of California having a varying history of enzootic St. Louis encephalitis activity ranging from consistent to rare; 1) wetlands and irrigated agriculture along the Salton Sea, 2) urban Los Angeles in the cool maritime western coast, 3) irrigated agriculture in the southern San Joaquin Valley, and 4) riparian and suburban housing areas in the Sacramento Valley. Surveillance parameters measured included mosquito abundance [dry ice and gravid traps], mosquito infection, sentinel chicken seroconversion, free ranging bird seroprevalence, dead bird reporting, horse cases and human cases. Concurrent studies on avian and mosquito host competence are discussed.
Species 1: Diptera Culicidae Culex tarsalis
Keywords: West Nile virus, invasion
Back to Ten-Minute Papers, Section D. Medical and Veterinary Entomology
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