Contagious Equine Metritis (CEM) is a venereal disease caused by the bacteria, Taylorella equigenitalis affecting only the equine species. It can have significant impacts on reproduction.  Treatment of CEM is usually successful.  CEM has not been shown to be zoonotic.  The United States is considered CEM free and therefore it is a Foreign Animal Disease reportable at both the Federal and State level.  Horses imported to the United States must meet certain import criteria or undergo CEM quarantine procedures at an approved facility to demonstrate freedom of CEM.

ELISA assay, for detection of specific antibodies to Contagious Equine Metritis (CEM) in equine sera.