1. Department of Microbiology, Graduate School of Medical and Dental Sciences, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan
2. Osaka Institute of Public Health, 1-3-69 Nakamichi, Higasinari-ku, Osaka 537-0025, Japan
3. Department of Bacteriology, Faculty of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
4. Department of Animal and Grassland Sciences, Faculty of Agriculture, University of Miyazaki, 1-1 Gakuen-kibanadai-nishi, Miyazaki 889-2192, Japan
5. Fukuoka City Institute of Hygiene and the Environment, 2-1-34 Jigyohama, Chuo-ku, Fukuoka 810-0065, Japan
6. Fukuoka Institute of Health and Environmental Sciences, 39 Mukaizano, Dazaifu, Fukuoka 818-0135, Japan
7. Hokkaido Institute of Public Health, Kita-19, Nishi-12, Kita-ku, Sapporo 060-0819, Japan
8. Kumamoto City Environmental Research Institute, 404-1, Ezumachi Tokorojima, Higashi-ku, Kumamoto 862-0946, Japan
9. Akita Prefectural Research Center for Public Health and Environment, 6-6 Senshu Kubota-machi, Akita 010-0874, Japan
10. Miyazaki Prefectural Institute for Public Health and Environment, 2-3-2 Gakuen-kibanadai-nishi, Miyazaki 889-2155, Japan
11. National Institute of Health Sciences, 3-25-26, Tonomachi, Kawasaki-ku, Kawasaki 210-9501, Japan
12. Infectious Disease Surveillance Center, National Institute of Infectious Diseases, 4-7-1 Gakuen, Musashi-murayama, Tokyo 208-0011, Japan