1. National Center for Emerging and Zoonotic Infectious Diseases, Division of Foodborne, Waterborne, and Environmental Diseases, 755 Parfet Street, Suite 494, Lakewood, Colorado 80215, USA
2. U.S. Department of Agriculture, Animal and Plant Health Inspection Service, 755 Parfet Street, Suite 494, Lakewood, Colorado 80215, USA
3. Center for Global Health, Division of Global Health Protection, Division of STD Prevention, Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, Georgia 30329
4. National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention, Division of STD Prevention, Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, Georgia 30329