10.22376/ijpbs.2019.10.1.p1-12 Volume 4 Issue 4 2013 (October - December) Phytochemical constituents of lessThan i greaterThan Allium porrum lessThan /i greaterThan leaf extracts and its antibacterial potentialities were evaluated using different solvents. Phytochemical screening of the different extracts showed that leaves contains important compounds such as amino acid with sulphate, carbohydrates, Phenols, Proteins, flavonoids, alkaloids, steroids, Tannins and saponin. Aqueous, methanol and acetone extracts of plant leaves were used for assessing antibacterial activity against lessThan i greaterThan Salmonella typhi, Klebsiella pneumonia, Staphylococcus aureus, Pseudomonas aeruginosa lessThan /i greaterThan and lessThan i greaterThan Proteus vulgaris lessThan /i greaterThan by agar well diffusion method. The present study demonstrated that the aqueous, methanolic, acetone extracts of lessThan i greaterThan A. porrum lessThan /i greaterThan consists different phytochemical components thus exhibit variations in the antibacterial activity. These promissory extracts open the prospect of finding new clinically effective antibacterial compounds. T. USHADEVI, R. SATHYA, R. SHANMUGAPRIYA AND K.ANANDHI Allium porrum, Aqueous extract, Phytochemical, Antibacterial. 647-651