MONTPELIER (AP) - The Vermont state veterinarian is urging horse owners to vaccinate their animals against Eastern Equine Encephalitis and West Nile virus.

Both diseases are transmitted by the bites of infected mosquitoes.

Veterinarian Kristin Haas says spring is the time of year when horse owners should consult their veterinarians to ensure that their horses are appropriately vaccinated.

Haas says even horses that remain alone during the summer are susceptible to both diseases.

She says that both viruses are known to be present in Vermont so horses should be vaccinated.

EEE kills nearly all the horses that get sick.

Mammals, including horses, which contract EEE and West Nile are generally unable to transmit it to other animals, or people.