Mosquito-Borne Equine Diseases Prevalent on Both Coasts

As of Aug. 25, Florida led the United States in the number of documented equine cases of Eastern equine encephalitis (EEE), a mosquito-borne disease with mortality rates of around 90% in horses. Washington state officials had confirmed the most equine cases of West Nile virus (WNV) this year.

Thus far in 2009 cases of EEE are largely clustered in the Southeast. According to the USDA’s

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As of Aug. 25, Florida led the United States in the number of documented equine cases of Eastern equine encephalitis (EEE), a mosquito-borne disease with mortality rates of around 90% in horses. Washington state officials had confirmed the most equine cases of West Nile virus (WNV) this year.

Thus far in 2009 cases of EEE are largely clustered in the Southeast. According to the USDA’s latest report at press time, Florida had 63 reported cases. Other Southern states with double-digit case counts included Georgia (36), Mississippi (26), Alabama (15), and North Carolina (12).

In 2008 there were 185 equine cases of EEE reported in 15 states. Florida also topped that year-end tally with 89 cases.

On the WNV front, as of Aug. 25 Washington state animal health authorities had reported 21 equine cases. Other states reporting multiple cases included Montana (6), California (4), Alabama (3), Kentucky (2), Louisiana (2), and Texas (2)

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Written by:

Erin Ryder is a former news editor of The Horse: Your Guide To Equine Health Care.

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