Daisuke Tanaka, Tomoko Shima, Junko Isobe, Masanori Watahiki*, Masakado Matsumoto, Miyoko Endoh, Rumi Okuno, Kikuyo Ogata and Yoshiyuki Nagai Department of Bacteriology, Toyama Institute of Health, Toyama 939-0363; Department of Microbiology, Aichi Prefectural Institute of Public Health, Nagoya 462-8576; Department of Microbiology, Tokyo Metropolitan Public Health Research Institute, Tokyo 169-...