Horse near Tucson tests positive for New World screwworm

Pima County officials confirmed Saturday that a domesticated horse near Tucson tested positive for New World screwworm, the first animal case identified in the county. Arizona has reported seven cases, but none in people in the United States. Officials said the horse had no known travel history and that the risk to humans remains low. County and state agencies are coordinating their response and will hold a virtual public town hall Monday.