Antibacterial activity of Saponins extract from Sider (Ziziphus spina_christi)

Saponin extract from Sider ( Ziziphus spina_christi ) were evaluated for his antibacterial activity against gram negative bacteria like E.coli , Proteus mirabilis and gram positive like Staphylococcus aureus, Streptococcus pneumoniae. The inhibitory effect in vitro was defined to appare inhibition zone around the paper disc [paper disc method].The study revealed that 30% (w/ v) concentration most active against bacteria.