1. Florida Game and Fresh Water Fish Commission, Wildlife Research Laboratory, 4005 S. Main St., Gainesville, Florida 32601, USA
2. Department of Small Animal Clinical Science, College of Veterinary Medicine, University of Florida, Gainesville, Florida 32610, USA
3. Department of Infectious Diseases, College of Veterinary Medicine, University of Florida, Gainesville, Florida 32611, USA
4. Present address: Tanzania National Parks, % Serengeti Wildlife Research Institute, P.O. Box 3134, Arusha, Tanzania
5. Person to whom reprint requests should be sent
6. Department of Microbiology, Immunology and Parasitology, and the Cornell Feline Health Center, New York State College of Veterinary Medicine, Cornell University, Ithaca, New York 14853, USA
7. Department of Veterinary Clinical Medicine and Surgery, College of Veterinary Medicine, Washington State University, Pullman, Washington 99164, USA
8. Department of Veterinary Microbiology and Preventative Medicine, College of Veterinary Medicine, Iowa State University, Ames, Iowa 50011, USA