1. Laboratories of Veterinary Public Health, Department of Veterinary Medicine, College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa, Kanagawa 252-8510, Japan
2. Faculty of Veterinary Medicine, Kasetsart University, Bangkok 10903, Thailand
3. Chuou Meat Inspection Center, Gunma Prefecture, Tamamura-machi, Sawa-gun, Gunma 370-1100, Thailand
4. Veterinary Surgery, Department of Veterinary Medicine, College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa, Kanagawa 252-8510, Japan
5. Preventive Medicine and Animal Health, Department of Veterinary Medicine, College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa, Kanagawa 252-8510, Japan
6. First Department of Oral Surgery, School of Dentistry at Matsudo, Nihon University, 2-870-1 Sakae-cho-nishi, Matsudo, Chiba 271-8587, Japan