Antibacterial Activity of Clove Extracts on Growth of Some Pathogenic Bacteria

Abstract

The disc diffusion technique was used to determine the antibacterial activity of aqueous and alcoholic extracts of clove against two harmful bacteria (Staphylococcus aureus and Escherichia coli) obtained from the Bacteriology laboratory at the medical technical institute-Almansour. The result were showed that the alcoholic extract of clove have more activity than aqueous one in growth inhibition of tested bacteria, and the Staph. aureus as a gram positive bacteria was inhibited in their growth more than E.coli as a gram negative bacteria. The zone of growth inhibition of Staph. aureus in aqueous extract was (14mm) and in alcoholic extract was (18mm) , while in E.coli the inhibition zone of growth inhibition was (10mm) in aqueous extract and (14mm) in alcoholics extract comparing with standard antibiotics Gentamicin (20mg/2ml) which shows (24mm) for Staph. aureus and (24mm) for E.coli .