1. Department of Veterinary Microbiology and Preventive Medicine, College of Veterinary Medicine, Iowa State University, Ames, Iowa, USA
2. Roche Sequencing Solutions, Belmont, California, USA
3. Food Safety and Enteric Pathogens Research Unit, National Animal Disease Center, ARS-USDA, Ames, Iowa, USA
4. Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, Georgia, USA
5. Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, Georgia, USA