1. Department of Research and Scientific Services, National Zoological Gardens of South Africa, Pretoria, South Africa
2. Department of Paraclinical Sciences, Faculty of Veterinary Science, University of Pretoria, Pretoria, South Africa
3. Department of Pathology, Microbiology and Immunology, School of Veterinary Medicine, University of California, Davis, Davis, CA, USA
4. Veterinary Laboratory Investigation and Response Network, Office of Research, Center for Veterinary Medicine, U.S. Food and Drug Administration, Laurel, MD, USA
5. Office of Regulatory Science, Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration, College Park, MD, USA
6. Vet Diagnostics, Lyon, France
7. Department of Production Animal Studies, Faculty of Veterinary Science, University of Pretoria, Pretoria, South Africa
8. Zoological Pathology Program, University of Illinois, Brookfield, IL, USA