This study was aimed to treat the hydatid disease that caused by the larval stage of
Echinococcus granulosus using two water plant extracts (leaves of Myrtus communis,
seeds of Nigella sativa). The effect of these extracts had been studied on the viability of
E. granulosus protoscolices in vitro using five concentrations of each of them ranging
between ( 30,35,40,45,50)mg\ml for the plants extracts, The preliminary results revealed
that M. communis extract was the most effective in killing the protoscolices in vitr than
N.sativa in comparison to the control group.