PRINEVILLE, OR -- For the first time in Crook county, a horse has tested positive for West Nile Virus. Crook County Communicable Disease Coordinator Karen Yeargain says in 2004 a bird tested positive for the virus but this is the first case of a horse being confirmed with the disease. Yeargain says to fight West Nile Virus, people need to avoid mosquito bites and prevent mosquito breeding on their property. Yeargain says this horse was lucky. She says 95-per cent of horses with West Nile Virus, die.