| occurrence of some medically important flukes (trematoda: opisthorchiidae and heterophyidae) in nam ngum water reservoir, laos. | occurrence of some medically important flukes transmitted to man by eating of raw fish was observed at 18 localities of nam ngum water reservoir, an important source of fish for inhabitants of vientiane province, laos. cercariae of opisthorchis viverrini were recorded in 0.9% of bithynia siamensis goniomphalus examined but in the most populated sites, where the density of the snails was the highest up to 2.2% of the intermediate hosts were infected. haplorchis cercariae were found in 2.0% of tar ... | 1990 | 2075492 |