The first human cases of Opisthorchis viverrini infection
were reported in Thailand nearly 100 years ago.1 O. viverrini
is endemic in the Lower Mekong Basin, including Thailand,
Lao People’s Democratic Republic (Lao PDR), Cambodia,
and central Vietnam.1 Specifically, O. viverrini and other
fluke infections (i.e., minute intestinal flukes [MIFs] and the
blood fluke Schistosoma mekongi) and soil-transmitted helminths
are endemic.