NASHVILLE (AP) - Tennessee officials are advising people to take precautions after a horse in West Tennessee tested positive for Eastern Equine Encephalitis.

The state Departments of Agriculture and Health say the virus can be fatal for horses and humans. Mosquitoes transmit the virus, and humans can't contract it directly from infected horses.

Medical entomologist Dr. Abelardo Moncayo said in a news release from the agencies that Tennessee has never had a documented human case of the virus but people should remember mosquito-borne diseases can occur in the summer.

The horse infected in Madison County didn't survive. The release says the virus kills up to 90 percent of horses infected. There is no vaccine for humans, but there is an effective horse vaccine.

Deputy State Epidemiologist John Dunn says the state is asking citizens to use preventive measures to avoid mosquito-borne diseases.