Survival (mean ± SD) of E. granulosus protoscoleces after exposure to either culture medium (alone or supplemented with methanol; control group), flubendazole (FLBZ), reduced flubendazole (R-FLBZ), albendazole (ABZ), or albendazole sulfoxide (ABZSO) at the same concentrations (10 nmol/ml) over 54 days. ▴, control medium; ▵, control medium + methanol; ▪, FLBZ; □, R-FLBZ; •, ABZ; ○, ABZSO.