Virus from mosquito detected on Ontario County horse

The Ontario County Public Health received notice that a 1-year-old horse tested positive for Eastern Equine Encephalitis (EEE). This is the first time EEE has been documented in a mammal in Ontario County.

Ontario County Public Health is working with the New York State Department of Health and Agriculture to notify horse owners, veterinarians, and the public.

Enhanced surveillance for EEE is underway in the county.

EEE is caused by a virus transmitted by a certain type of mosquito. Humans rarely become infected, but if they do, the illness is serious and can be fatal due to brain inflammation.

Ontario County Public Health said EEE is not transmissible person-to-person, horse-to-horse, or horse-to-human.

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