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New York Horse Succumbs to Eastern Equine Encephalomyelitis

August 19, 2019
Posted by Edited Press Release

The yearling filly marks the first confirmed New York case of EEE in 2019.

Topics: Article, Diseases and Conditions, Eastern Equine Encephalitis (EEE), Horse Care, Horse Industry News, Welfare and Industry

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New York Horse Succumbs to Eastern Equine Encephalomyelitis

According to the New York State Department of Agriculture, the mare, located in West Monroe, Oswego County, New York, had been vaccinated. | Photo: Wikimedia Commons

Veterinarians humanely euthanized a yearling filly of unidentified breed on Aug. 13 after she developed clinical signs of Eastern equine encephalitis (EEE) on Aug. 10. Signs included ataxia (incoordination), blindness, and dullness. Diagnostic samples obtained from the mare confirmed her positive for EEE on Aug. 15.

According to the New York State Department of Agriculture, the mare, located in West Monroe, Oswego County, New York, had been vaccinated.

EEE 101

Eastern equine encephalomyelitis is caused by the Eastern equine encephalitis virus, for which wild birds are a natural reservoir. Mosquitoes that feed on EEE-infected birds can transmit the virus to humans, horses, and other birds. Horses do not develop high enough levels of these viruses in their blood to be contagious to other animals or humans. Because of the high mortality rate in horses and humans, EEE is regarded as one of the most serious mosquito-borne diseases in the United States

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