Animal health officials in Florida and South Carolina have confirmed new equine cases of Eastern equine encephalitis (EEE).

The Florida Department of Agriculture and Consumer Services told the Equine Disease Communication Center (EDCC) that, on June 24, two new EEE case were confirmed, one each in Jefferson and Walton County, Florida.

“The Jefferson County case, an 8-year-old Draft horse, became clinical on June 16 and had previous vaccination history in September 2015,” an update from the EDCC said. “The gelding was euthanized for humane reasons.

“The Walton County case had no vaccination history and no reported travel history with in the past month,” the statement continued. “Clinical signs began on June 17 and the horse died of natural causes on June 19.”

These are the first confirmed EEE case in Jefferson and Walton County for 2016 and the fifth and sixth confirmed cases in Florida this year.

Meanwhile, in South Carolina, the state veterinarian’s office received laboratory confirmation of one new case of EEE last week, the EDCC reported. The horse, located in Marion County, was euthanized. This is the fourth case of EEE confirmed in South Carolina this year.

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A viral disease, EEE affects the central nervous system and is transmitted to horses by infected mosquitoes. Clinical signs of EEE include moderate to high fever, depression, lack of appetite, cranial nerve deficits (facial paralysis, tongue weakness, difficulty swallowing), behavioral changes (aggression, self-mutila