1. The United Graduate School of Veterinary Science; Yamaguchi University; Yamaguchi Japan
2. Department of Veterinary Medicine; Joint Faculty of Veterinary Medicine; Yamaguchi University; Yamaguchi Japan
3. Laboratory of Systemic Infection; Department of Bacteriology-I; National Institute of Infectious Diseases; Tokyo Japan
4. Faculty of Medical Science; University of Fukui; Eiheiji Fukui Japan
5. Joint Faculty of Veterinary Medicine; Kagoshima University; Kagoshima Japan
6. Department of Medical Zoology; Kanazawa Medical University; Kahoku Ishikawa Japan
7. Meat Inspection Center of Iwate Prefecture; Iwate Japan
8. Department of Veterinary Science; National Institute of Infectious Diseases; Tokyo Japan