Antibacterial activity of selected Medicinal plants from South India

Plan: Antibacterial activity ofleaves and seed of Pongamia pinnata and Lawsonia innermis have been studied fortheir antimicrobial activities using agar well diffusion method.Methodology: Theselected bacterial strains, namely Bacillus subtilis, Escherichia coli,Enterobacter aerogenes, Micrococcus luteus and Pseudomonas aeroginosa isolatedfrom PSG Hospital, Coimbatore, Tamilnadu were selected for the study. Maximumzone of inhibition of the active compounds was evaluated by using NCCLS Method.The plant extracts were tested with the standard positive controlchloramphenicol.Outcome: Among the three solvents analysed ethanolic leaf extract ofPongamia pinnata and Lowsonia innermis exhibited a maximum resistance againstBacillus subtilus and possessed a highest inhibitory zone against Pseudomonasaeroginosa and Micrococcus luteus respectively when compared to other bacterialstrains.