A. ChanawongJ. WaikagulMahidol University2018-08-102018-08-101991-06-01The Southeast Asian journal of tropical medicine and public health. Vol.22, No.2 (1991), 235-239012515622-s2.0-0026178428https://repository.li.mahidol.ac.th/handle/20.500.14594/22137The 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.Mahidol UniversityMedicineArticleSCOPUS