[1] Tokushima Bunri Univ, Fac Pharmaceut Sci, Dept Microbiol, Yamashiro, Tokushima 7708514, Japan
[2] Hiroshima Int Univ, Fac Pharmaceut Sci, Lab Mol Microbiol Sci, Kure, Hiroshima 7370112, Japan
[3] Kyoto Pharmaceut Univ, Dept Microbiol & Infect Control Sci, Kyoto 6078414, Japan
[4] Kitasato Univ, Dept Microbiol, Sch Med, Minami Ku, 1-15-1 Kitasato, Sagamihara, Kanagawa 2520374, Japan
[5] Hiroshima Univ, Grad Sch Biomed & Hlth Sci, Dept Bacteriol, Minami Ku, 1-2-3 Kasumi, Hiroshima 7348551, Japan
[6] Yokohama Univ Pharm, Fac Pharm, Totsuka Ku, 601 Matano Cho, Yokohama, Kanagawa 2450066, Japan