Department of Parasitology, Faculty of Medicine, Chulalongkorn University, Bangkok, 10330, Thailand.|Department of Parasitology, Faculty of Medicine, Chulalongkorn University, Bangkok, 10330, Thailand.|Department of Computer Science and Information Technology, Faculty of Science, Naresuan University, Phitsanulok, 65000, Thailand.|Department of Mathematics, Faculty of Science, Naresuan University, Phitsanulok, 65000, Thailand.|Department of Computer Science and Information Technology, Faculty of Science, Naresuan University, Phitsanulok, 65000, Thailand. kraisakk@nu.ac.th.