| horse species symposium: contagious equine metritis: an insidious threat to the horse breeding industry in the united states. | contagious equine metritis (cem) has given rise to international concern since it was first recognized as a novel venereal disease of equids in 1977 and the etiologic agent was identified as a previously undescribed bacterium, taylorella equigenitalis. horse industry concerns over cem centered on the ease with which this bacterium could be disseminated, the significance of t. equigenitalis as a cause of short-term infertility in the mare, and the existence of the carrier state in the stallion an ... | 2010 | 20889687 |