History of opisthorchiasis control started in 1950 as a small scale helminthiasis control program in some high risk areas.
Following a number of studies and trial projects of the Faculty of Tropical Medicine, Mahidol University, the national liver
fluke control program has been developed and operated under several National Public Health Development Plans. Presently, the
program is being operated in some provinces of the Central, and all provinces of the Northeast and North of Thailand.