The horse that died in Winnsboro had been sick since last Tuesday. It was euthanized Sunday.
The animal had been stumbling, was weak, and had stiff muscles. Those symptoms are very similar to what happens in humans.
"Mortality rate [in horses] is 30-40 percent. It mimics what we see in humans. The elderly, the old, and the horse with compromised immune system will be the most severely affected."
That horse was 22 years old.
Neither horses nor birds can transmit the West Nile virus to humans.