1. Department of Fishery Biology, Faculty of Fisheries, Kasetsart University, Bangkok, Thailand
2. Graduate Institute of Microbiology and Public Health, College of Veterinary Medicine, National Chung Hsing University, Taichung, Taiwan
3. Department of Veterinary Medicine, College of Veterinary Medicine, National Chung Hsing University, Taichung, Taiwan
4. Biology Division, Animal Health Research Institute, Council of Agriculture, Executive Yuan, New Taipei City, Taiwan