On Wednesday, July 11, 2018, the North Carolina Department of Agriculture and Consumer Services confirmed Eastern Equine Encephalitis (EEE) in a 13-year old, unvaccinated, female chestnut draft mix located in Onslow County, North Carolina. This is the second case of EEE in North Carolina for 2018.

Beautiful horses
Horses
Public domain image/Dusan Bicanski

This follows reports of a EEE case in Richmond County last week.

EEE is a mosquito-transmitted disease that is much more severe than West Nile Virus (WNV).  The mortality rate in horses from WNV is reported at around 30%, while the rate for EEE is almost 90%.  Infected mosquitoes are the primary source for EEE.

The virus causes inflammation or swelling of the brain and spinal cord.  General symptoms include central nervous system signs such as: head pressing, convulsions, lack of response to facial stimulation, fever above 103 degrees, ataxia, paralysis, anorexia, depression and stupor.  Other symptoms may include irregular gait, teeth grinding, in-coordination, circling, and staggering.  All symptoms may not be exhibited by an infected horse.