Evaluation of Anti bacterial Activity of Various Extract of Hibiscus syriacus

Bioassays for antimicrobial activities were carried out using leaves of Hibiscus syriacus plants. Petrolium ether, Dichloro-methane, Isopropyl alcohol extracts from leaves of Hibiscus syriacus was prepared and tested against gram positive bacteria i.e. Bacillus cereus (MTCC 430), Staphylococcus aureus (MTCC 3160)gram negative bacteria Escherichia coli (MTCC433) and Klebsilla pneumoniae (MTCC432). Both the Petrolium ether and Isopropyl alcohol extracts showed considerable activity against all the test organisms. The Dichloro-methane extracts of Hibiscus syriacus which showed no activity against all the bacteria. The Minimum Inhibitory Concentration (MIC) of the plant extracts ranged from 0.01 mg/ml to 100 mg/ml. The antibacterial activities of both the Petroleum ether and Isopropyl alcohol plant extracts were comparable to those of selected chemical antibiotics suggesting their potential as alternatives to the antibiotics in the treatment of infections caused by these microorganisms.