Public health officials say a horse from Ossipee has tested positive for eastern equine encephalitis. A horse in Derry tested positive for the mosquito-borne disease last week. The most recent finding raises the risk level for the town of Ossipee from "remote" to "high." The surrounding towns of Tamworth, Madison, Freedom, Effingham, Wakefield, Brookfield, Wolfeboro, Tuftonborough and Moultonborough will increase to a "moderate" risk level.