1. Department of Pathobiology, College of Veterinary Medicine, University of Illinois Urbana-Champaign , Urbana, Illinois, USA
2. Roy J. Carver Biotechnology Center, University of Illinois Urbana-Champaign , Urbana, Illinois, USA
3. Wildlife Epidemiology Laboratory, Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois Urbana-Champaign , Urbana, Illinois, USA
4. Veterinary Diagnostic Laboratory, College of Veterinary Medicine, University of Illinois Urbana-Champaign , Urbana, Illinois, USA
5. Chicago Zoological Society, Brookfield Zoo , Brookfield, Illinois, USA
6. Zoological Pathology Program, Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois Urbana-Champaign , Brookfield, Illinois, USA