1. Department of Parasitology and Entomology, Faculty of Public Health, Mahidol University, 420/1 Rajvithi Road, Rajthewee, Bangkok 10400, Thailand
2. Department of Clinic, Faculty of Veterinary Medicine, Mahanakorn University of Technology, 140 Cheum-Sampan Road, Nong-Chok, Bangkok 10530, Thailand
3. Department of Fundamentals of Public Health, Faculty of Public Health, Burapha University, Chonburi 20131, Thailand
4. Department of Tropical Hygiene, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand
5. Ministry of Public Health, Department of Disease Control, The 11th Regional Office of Disease Prevention and Control, Nakhon Si Thammarat 80000, Thailand