MADISON, Wis. (AP) -- The state veterinarian says 25 cases of a deadly horse disease have been confirmed in Wisconsin, most in the north central area of the state.

The cases of equine encephalitis have been found in Price, Lincoln, Taylor, Clark, Marathon and Dunn counties. Dr. Richard Ehlenfeldt says more cases are likely to be confirmed. The disease is mosquito-borne and has a mortality rate of 90 percent or higher.

Wisconsin last had a large-scale outbreak of the disease in 2001 when 69 cases were confirmed. Since then, the number of cases has been sporadic. The Eau Claire Leader-Telegram says Ehlenfeldt advises horse owners to call a vet if they see any signs of the central nervous system disease, such as drooping eyelids, loss of appetite or aimless wandering and circling.