Effect of Aqeous Extracts of Capparis spinosa and Citrullus colocynthis Plants on Growth of Leishminia major Promastigotes in Vitro

The poisonous effect of Capparis spinosa and Citrullus colocynthis aqeous extracts were investigated on the growth of Leishmania major promastigotes in vitro .
The results indicate that these extracts affect greatly the number of Leishmania major promatigotes at concentration between ( 1.75 4.25) mg/ml for Capparis and (1.25 2.5) mg / ml for citrullus respective. The decrease was gradual during the growth period. High concentration (4.25) mg/ml of Capparis plant extract caused about (73%) decrease in the number and (79%)at concentration on(2.5) mg / ml of citrullus extract at (96) hours of growth.