The U.S. Department of Agriculture’s (USDA) Animal and Plant Health Inspection Service (APHIS) ) has added the Republic of Korea to the list of regions considered affected with contagious equine metritis (CEM). APHIS took this action because of the confirmation of CEM, a highly contagious venereal disease of horses and other equines caused by an infection from a bacterium, in the Republic of Korea. As a result, horses and other equines from the Republic of Korea are subject to APHIS import restrictions designed to mitigate risk of CEM introduction into the United States. These restrictions are effective retroactively to May 7, 2015. The list of regions affected with CEM is maintained on the APHIS Web site at https://www.aphis.usda.gov/aphis/ourfocus/animalhealth/animal-and-animal-product-import-information/ct_animal_disease_status.