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Outbreak of Eastern Equine Encephalomyelitis ReportedBy Kentucky Equine Research Staff · July 9, 2012

Eastern equine encephalomyelitis (EEE) has been confirmed in horses in South Carolina, Florida, and Georgia, in the last few weeks. The disease is spread by mosquitoes and can be prevented in horses by vaccination, and horse owners should check with their veterinarians to be sure vaccinations are current for their horses.

EEE can also affect humans, though infection is fairly uncommon. In humans, mild cases may cause no symptoms. More serious cases are marked by headache, high fever, chills, and vomiting.

Horses with EEE may show incoordination, stumbling, circling, head pressing, depression, weakness, inability to stand, and muscle twitching. The fatality rate is high among infected horses.