Abstract
Microbiology and Virology Centre, Polish Academy of Science, Lodz 93-232, Poland, *Department of Microbiology, Jichi Medical School, Minamikawachi-machi, Tochigi-ken 329-0498, †Department of Infectious Diseases and Tropical Medicine, Research Institute, International Medical Center of Japan, Tokyo 162-8655, ‡Department of Bacteriology, School of Medicine, Iwate Medical University, Morioka 020-8505, Faculty of Science, Osaka University, Toyonaka, Osaka 560-0043 and || Department of Microbiology and Immunology, Aichi Medical University, Nagakute, Aichi 480-1195, Japan
Corresponding author: Dr T. Kirikae (e-mail: tkirikae{at}ri.imcj.go.jp ).