1. Department of Veterinary PathoBiology, College of Veterinary Medicine, University of Minnesota, St. Paul, Minnesota, 55108 USA
2. Wildlife Rehabilitation Center, College of Veterinary Medicine, University of Minnesota, St. Paul, Minnesota, 55108 USA
3. Department of Farm Animal Health and Resources Management, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina 27606, USA
4. Department of Clinical and Population Sciences, College of Veterinary Medicine, University of Minnesota, St. Paul, Minnesota, 55108 USA