Equine WNV, EEE Case Totals Continue to Rise

As of Nov. 6, the USGS indicated that the WNV and EEE totals had risen to 620 and 204, respectively.
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Although cooler temperatures have arrived in many parts of the country, the number of equine West Nile virus (WNV) and Eastern equine encephalitis (EEE) cases still continues to rise.

At their most recent update on Oct. 30, the USDA Animal and Plant Health Inspection Service (APHIS) reported that 566 cases of equine WNV had been confirmed nationwide since the start of the year; in that same time span, 195 EEE cases had been diagnosed. As of Nov. 6, the United States Geological Survey (USGS) disease maps indicated that the WNV and EEE totals had risen to 620 and 204, respectively.

At most recent update, the USGS reported that Texas (100 cases), Louisiana (62 cases), Pennsylvania (50 cases), and California (45 cases) have tallied the most WNV cases this year. Louisiana (56 cases), Mississippi (31 cases), and Florida (29 cases) have reported the most EEE cases, also according to the USGS.

Another mosquito-borne disease, Western equine encephalitis, has not been identified in the United States this year

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Written by:

Erica Larson, former news editor for The Horse, holds a degree in journalism with an external specialty in equine science from Michigan State University in East Lansing. A Massachusetts native, she grew up in the saddle and has dabbled in a variety of disciplines including foxhunting, saddle seat, and mounted games. Currently, Erica competes in eventing with her OTTB, Dorado.

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