1. Department of Microbiology; Gifu University Graduate School of Medicine
2. Department of Bacteriology, Mycology and Immunology; Faculty of Veterinary Medicine, Kafrelsheikh University; 33516 Egypt
3. Division of Anaerobe Research, Life Science Research Center; Gifu University; 1-1 Yanagido Gifu 501-1194
4. Biological Resource Center; National Institute of Technology and Evaluation; 2-5-8, Kazusakamatari, Kisarazu-shi Chiba 292-0818 Japan