Affiliation: | 1. Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO;2. Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO;3. Center for Epidemiology and Animal Health, VS, USDA APHIS, Fort Collins, CO |