1. Bureau of Veterinary Biologics, Department of Livestock Developments, Ministry of Agriculture and Cooperative, Nakhon Ratchasima 30130, Thailand
2. Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai 50100 Thailand
3. Laboratory of Veterinary Microbiology, Nippon Veterinary and Life Science University, Tokyo 180-8602, Japan
4. Excellence Center in Veterinary Bioscience, Chiang Mai University, Chiang Mai, 50100, Thailand