| laboratory studies on host-parasite relationship of bithynia snails and the liver fluke, opisthorchis viverrini. | the infection rate of bithynia snails to opisthorchis viverrini eggs was studied in relation to exposure intensity, age and species of host. it was found that 50 miracidial eggs per snail yielded the highest percentage of living surviving positive snails. bithynia funiculata and bithynia siamensis siamensis were highly susceptible to o. viverrini, about four to seven times higher than bithynia siamensis goniomphalos. young snails, 1-3 months old, appeared more susceptible than old snails. | 1991 | 1948284 |
| field studies on the bionomics of bithynia siamensis siamensis and the transmission of opisthorchis viverrini in bangna, bangkok, thailand. | a field study on the bionomics of bithynia siamensis siamensis and the transmission patterns of opisthorchis viverrini was carried out in bangna, bangkok, thailand, from may 1975 to april 1976. snail populations were found to fluctuate according to rainfall. during the high rainfall period where snail habitats were deep, snail populations recovered at the water surface were higher than those recovered on the mud bottom; during the low rainfall perod where snail habitats were shallow, snails were ... | 1980 | 7444576 |