1. Laboratory of Microbiology, Department of Disease Control, Faculty of Veterinary Medicine, Hokkaido University, Hokkaido, Japan
2. Department of Veterinary Medicine, College of Agriculture, Can Tho University, Can Tho, Vietnam
3. Department of Animal Health, Ministry of Agriculture and Rural Development, Ha Noi, Vietnam
4. Regional Animal Health Office VII, Department of Animal Health, Ministry of Agriculture and Rural Development, Can Tho, Vietnam
5. Sub-Departments of Animal Health, Ministry of Agriculture and Rural Development, Vinh Long, Vietnam