The West Nile virus (WNV) 2003 season is well underway. Reports of equine cases are steadily rolling in from states where the virus has been detected before, and veterinary and public health officials in those states that haven’t experienced cases in the past four years are likely readying for their first detection of WNV. The USDA reported Aug. 11 that 309 equine cases of West Nile virus (WNV) have been reported in 2003. See the map here: https://www.aphis.usda.gov/vs/nahps/equine/wnv/map2003.html

An updated map showing the spread of WNV in birds, horses, humans, and mosquitoes (from state surveillance reports) can be viewed at www.TheHorse.com/wnv

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