RubySpring is coming and along with it mosquitoes and West Nile Virus:
Information for horse owners is available on the Oregon Department of Agriculture (ODA) website (pdf). Topics covered include the recommendation to have your horse vaccinated by your veterinarian, mosquito control, personal protection, reporting of cases, and additional links to Oregon Department of Human Services, FDA, CDC, NW Mosquito Control, and Guidelines for Clinicians.