1. Department of Veterinary Pathology, 52 Campus Drive, Saskatoon, Saskatchewan S7N 5B4, Canada
2. Department of Western College of Veterinary Medicine, University of Saskatchewan, and Prairie Diagnostic Services, 52 Campus Drive, Saskatoon, Saskatchewan S7N 5B4, Canada
3. Department of Microbiology, 52 Campus Drive, Saskatoon, Saskatchewan S7N 5B4, Canada