1. Department of Immunology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand
2. Division of Microbiology and Parasitology, Faculty of Medicine, Siam University, Bangkok 10160, Thailand
3. Faculty of Veterinary Medicine, Rajamangala University of Technology Tawan-ok, Chonburi 20110, Thailand
4. Department of Zoology, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand
5. Department of Veterinary Public Health, Faculty of Veterinary Medicine, Kasetsart University, Bangkok 10900, Thailand