A standard agar diffusion method was used for antibacterial assay (Murray et al., 1999). Petri plates were prepared by pouring 20 ml of the LB medium which was then allowed to solidify. Plates were dried and 0.1 ml of standardized inoculum containing 106 – 7 CFU/ml bacterial suspension was poured and uniformly spread; the inoculum was allowed to dry for 5 min. A Whatman No. 1 sterile filter paper disc (diameter: 6 mm) was impregnated with