1. Department of Mycobacteriology, Leprosy Research Center, National Institute of Infectious Diseases, Tokyo, Japan
2. The Laboratory of Aquatic Medicine, Nippon Veterinary and Life Science University, Tokyo, Japan
3. Niigata City Aquarium, Niigata, Japan
4. Research and Education Center for Prevention of Global Infectious Diseases of Animals, Tokyo University of Agriculture and Technology, Tokyo, Japan