West Nile Virus Infection in Birds and Mosquitoes, New York State, 2000

Abstract

West Nile (WN) virus was found throughout New York State in 2000, with the epicenter in New York City and surrounding counties. We tested 3,403 dead birds and 9,954 mosquito pools for WN virus during the transmission season. Sixty-three avian species, representing 30 families and 14 orders, tested positive for WN virus. The highest proportion of dead birds that tested positive for WN virus was in American Crows in the epicenter (67% positive, n=907). Eight mosquito species, representing four genera, were positive for WN virus. The minimum infection rate per 1,000 mosquitoes (MIR) was highest for Culex pipiens in the epicenter: 3.53 for the entire season and 7.49 for the peak week of August 13. Staten Island had the highest MIR (11.42 for Cx. pipiens), which was associated with the highest proportion of dead American Crows that tested positive for WN virus (92%, n=48) and the highest number of human cases (n=10).

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• The Native Wolbachia Endosymbionts of Drosophila melanogaster and Culex quinquefasciatus Increase Host Resistance to West Nile Virus Infection · 2010
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• West Nile Virus Risk Assessment and the Bridge Vector Paradigm · 2005
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• Dead Bird Clusters as an Early Warning System for West Nile Virus Activity · 2003
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• Experimental Infection of North American Birds with the New York 1999 Strain of West Nile Virus · 2003
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• Emergence of Usutu virus , an African Mosquito-Borne Flavivirus of the Japanese Encephalitis Virus Group, Central Europe · 2002
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