1. Postdoctoral Research Participation Program, Office of Research in Science and Education, Oak Ridge Associated Universities, Oak Ridge, TN 37831, USA
2. Diagnostic Bacteriology and Pathology Laboratory, National Veterinary Services Laboratories, Animal and Plant Health Inspection Service, United States Department of Agriculture, Ames, IA 50010, USA
3. Departamento de Microbiología, Facultad de Ciencias Veterinarias, Universidad Nacional de La Plata, La Plata 1427, Argentina
4. Transboundary Disease Analytics, Center for Epidemiology and Animal Health, Veterinary Services, Animal and Plant Health Inspection Service, United States Department of Agriculture, Fort Collins, CO 80526, USA
5. National Animal Health Laboratory Network, National Veterinary Services Laboratories, Animal and Plant Health Inspection Service, United States Department of Agriculture, Ames, IA 50010, USA