Acknowledgments
This research was financially supported by Research Grants from The Thailand Research Fund (Senior Research Scholar Fellowship) and Faculty of Science, Mahidol University to Prasert Sobhon, and a Research Grant for New Scholar co-funded by The Thailand Research Fund, Commission on Higher Education and Mahidol University to Panat Anuracpreeda. We would like to thank Assoc. Prof. Dr. David Piedrafita, Monash University, for providing F. hepatica antigen.