1. Department of Small Animal Medicine, University of Georgia College of Veterinary Medicine, University of Georgia, Athens, Georgia.
2. Department of Population Health, University of Georgia College of Veterinary Medicine, University of Georgia, Athens, Georgia.
3. Athens Diagnostic Laboratory, University of Georgia College of Veterinary Medicine, University of Georgia, Athens, Georgia.
4. Department of Infectious Diseases, University of Georgia College of Veterinary Medicine, University of Georgia, Athens, Georgia.