In late August, officials in South Carolina reported 11 horses had been infected with Eastern Equine Encephalitis in eight counties. Two of those horse have died.
On Wednesday, officials with Clemson Livestock and Poultry Health (CLPH) officials confirmed that a 4-year-old paint mare in Colleton County and a 2-year-old paint colt in Jasper County both had to be euthanized.
EEE is a dangerous mosquito-transmitted disease that often spreads from wild birds to mosquitoes to horses and humans.
The disease, can cause stumbling, poor coordination, paralysis and other symptoms in the animals. It is known to have a 90% fatality rate.