1. Section of Food Microbiology and Immunology, Diagnostic Center for Animal Health and Food Safety, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Japan
2. Department of Veterinary Medicine, College of Agriculture and Veterinary Medicine, University of Rwanda, the College of Agriculture and Veterinary Medicine, Butare, Rwanda
3. Division of Biomedical Food Research, National Institute of Health Sciences, Tokyo, Japan