1. Department of Microbiology; Faculty of Science; Kasetsart University; Bangkok Thailand
2. Center for Advanced Studies in Tropical Natural Resources; National Research University-Kasetsart University; Kasetsart University; Bangkok Thailand
3. Department of Biochemistry; Faculty of Medicine; Chulalongkorn University; Bangkok Thailand
4. Immunology Unit; Department of Microbiology; Faculty of Medicine; Chulalongkorn University; Bangkok Thailand