1. Department of Pathobiology, Ontario Veterinary College, University of Guelph, 50 Stone Rd E, Guelph Ontario, Canada N1G 2W1
2. Department of Population Medicine, Ontario Veterinary College, University of Guelph, 50 Stone Rd E, Guelph Ontario, Canada N1G 2W1
3. Canadian Wildlife Health Cooperative, Ontario Veterinary College, University of Guelph, 50 Stone Rd E, Guelph Ontario, Canada N1G 2W1