Prevention
There is no preventive vaccine available against EIAV. Federal and state control measures have lowered the incidence of EIA in the United States, but outbreaks still occur. Veterinarians, horse owners, and others in the equine industry can reduce the chance of exposure by testing for EIA as part of every pre-purchase examination, and requiring a recent negative EIA test before admitting any new horse to a farm. Other potential measures include requiring recent negative EIA tests for horses entering sales, racetracks, shows, and other events, and annual testing of all horses for EIA exposure. To further minimize transmission, different horses should never be injected with a common needle or syringe, instruments coming into contact with blood should be thoroughly disinfected, and flies should be controlled as rigorously as possible.