1. Department of Immunopathology and Microbiology, College of Veterinary Medicine and Biomedical Sciences, Cavite State University, Cavite, Philippines
2. College of Veterinary Medicine, Nueva Vizcaya State University, Nueva Vizcaya, Philippines
3. National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Hokkaido, Japan
4. College of Medicine, The University of the Philippines, Manila, Philippines