Daisuke Tanaka*, Junko Isobe, Shiho Hosorogi, Keiko Kimata, Miwako Shimizu, Koji Katori, Yotaku Gyobu, Yoshiyuki Nagai, Takayoshi Yamagishi, Tadahiro Karasawa and Shinichi Nakamura Department of Bacteriology, Toyama Institute of Health, Toyama 939-0363, Department of Laboratory Science, School of Health Sciences, Faculty of Medicine, Kanazawa University, Ishikawa 920-0942 and Department of Bacteriology, Graduate School of Medical Science, Kanazawa University, Ishikawa 920-8640