A horse from Waco in Madison County was euthanized Thursday due to the West Nile virus, according to officials.
So far this year, a dozen horses in Kentucky have been diagnosed with the West Nile virus, according to the state veterinarian's office.
To date, six of the horses have survived and six have had to be put down.
According to the Centers for Disease Control and Prevention, six humans in Kentucky have been infected with the virus this year.
According to the Kentucky Department of Agriculture, infected horses have been found in the following counties this year:
Health officials said until there is a killing frost, the West Nile virus will continue to be a potential problem.