The efficacy of albendazole was satisfactory : for Ascaris lumbricoides , with an egg reduction rate ( ERR ) of 99.8 % ; ( 95 % CI : 99.3-100 ) ; for hookworm , with an ERR of 93.6 % ; ( 95 % CI : 88.2-96 .6 ) and , for Trichuris trichiura , with an ERR of 72.7 % ; ( 95 % CI : 58.5-79 .1 ) .