Surveillance results from the first West Nile virus transmission season in Florida, 2001

Surveillance results from the first West Nile virus transmission season in Florida, 2001

After West Nile virus (WNV) was first detected in Florida in July 2001, intensive surveillance efforts over the following five months uncovered virus activity in 65 of the state's 67 counties with 1,106 wild birds, 492 horses, 194 sentinel chickens, and 12 people found infected with the virus....

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Bibliographic Details
Published in:The American journal of tropical medicine and hygiene Vol. 69; no. 2; p. 141
Main Authors: Blackmore, Carina G M, Stark, Lillian M, Jeter, William C, Oliveri, Robin L, Brooks, Robert G, Conti, Lisa A, Wiersma, Steven T
Format: Journal Article
Language:English
Published: United States 01-08-2003
Subjects:
Animals
Birds - virology
Chickens - virology
Culex - virology
Disease Outbreaks
Female
Florida - epidemiology
Horses - virology
Humans
Insect Vectors
Male
Middle Aged
Seasons
Sentinel Surveillance
West Nile Fever - epidemiology
West Nile Fever - etiology
West Nile Fever - prevention & control
West Nile virus - isolation & purification
Florida
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Summary:After West Nile virus (WNV) was first detected in Florida in July 2001, intensive surveillance efforts over the following five months uncovered virus activity in 65 of the state's 67 counties with 1,106 wild birds, 492 horses, 194 sentinel chickens, and 12 people found infected with the virus. Thirteen of 28 mosquito isolations came from Culex mosquitoes. As seen in the northeastern United States, wild bird mortality was the most sensitive surveillance method. However, unlike the predominantly urban 1999 and 2000 epizootics, the Florida transmission foci were rural with most activity detected in the northern part of the state. All human cases were preceded by the detection of WNV in animals; however, only eight of the twelve cases were preceded by reports of WNV activity in the county of residence. West Nile virus-positive animals detected by multiple surveillance systems preceded seven of these cases by two weeks or more.
ISSN:0002-9637
DOI:10.4269/ajtmh.2003.69.141