1. Laboratory of Animal Morphology, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Aichi 464-8602, Japan
2. Biology and Somatology Related Support Section, Nagoya University, Nagoya 464-8602, Japan
3. Laboratory of Veterinary Microbiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8515, Japan
4. Laboratory of Veterinary Microbiology, Cooperative Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Sawai, Fuchu, Tokyo 183-8509, Japan
5. Faculty of Veterinary Medicine Bogor Agricultural University-IPB University, Bogor 16680, Indonesia