New Equine EEE Case Confirmed in Marion County, Florida

The 15-year-old Paint mare was vaccinated in years prior but had not been vaccinated recently. She is recovering.
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The Equine Disease Communication Center (EDCC) reported Nov. 14 that Florida animal health officials have confirmed a new case of Eastern equine encephalitis (EEE).

“On Nov. 10, a new EEE case was confirmed in Marion County, Florida,” an EDCC statement said. “The 15-year-old Paint mare was vaccinated in years prior but had not been vaccinated recently and had no recent travel history. Clinical signs began on Oct. 28 and the mare is currently recovering.”

This is Marion County’s second EEE case and Florida’s 23rd case for 2016.

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-mutilation, or drowsiness), gait abnormalities, or severe central nervous system signs, such as head-pressing, circling, blindness, and seizures. The course of EEE can be swift, with death occurring two to three days after onset of clinical signs despite intensive care. Horses that survive might have long-lasting impairments and neurologic problems

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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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