Acknowledgments
The support to this study provided by the Graduate School, Kasetsart University and the EU funded FP7 project on Sustaining Ethical Aquaculture Trade (SEAT), especially the office in Thailand, are gratefully acknowledged. The support on statistics, molecular methods and mentorship and inspiration from Dr. K Darwin Murrell and Dr. Henry Madsen from the Department of Veterinary Disease Biology and Dr. Sirichai Wongnakpet from the Department of Veterinary Public Health and Diagnostic Services, Faculty of Veterinary Medicine, Kasetsart University are deeply appreciated and includes Dr. Jitra Waikagul from the Department of Helminthology, Faculty of Tropical Medicine, Mahidol University. Finally, we thank the farmers that allowed us to work with them and sample fish at their farms