1. Laboratory of Pathology, School of Life and Environmental Science, Azabu University, Kanagawa 252-5201, Japan
2. Laboratory of Farm Animal Internal Medicine, School of Veterinary Medicine, Azabu University, Kanagawa 252-5201, Japan
3. Laboratory of Infectious Diseases, School of Veterinary Medicine, Azabu University, Kanagawa 252-5201, Japan
4. Laboratory of Clinical Diagnosis, School of Veterinary Medicine, Azabu University, Kanagawa 252-5201, Japan
5. Research and Education Center for Prevention of Global Infectious Diseases of Animal, Tokyo University of Agriculture and Technology, Tokyo 183-0054, Japan
6. Nasu Animal Kingdom, Tochigi 329-3223, Japan
7. Laboratory of Small Animal Clinics, Veterinary Teaching Hospital, Azabu University, Kanagawa 252-5201, Japan