• Fact SheetEven when clinically ill horses recover from
West Nile encephalitis, up to 40 percent of
them may have residual effects, such as gait
abnormalities and a change in their usual
temperament or behavior.
• WNV Equine Testing ResultsResults of West Nile virus testing for 2003-2008 on horses submitted to Michigan State University, Diagnostic Center for Population and Animal Health. Table is updated as data becomes available.