Antimicrobial activity of a few medicinal plants against gram negative bacteria.
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Date
2011-07
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Abstract
The methanol and aqueous extracts of leaves of five different medicinal plants, Solanum
nigrum L., Solanum torvum Sw., Solanum trilobatum L., Solanum surattense Burm. and Solanum
melongena L. belonging to Solanaceae family were used for the investigation of antibacterial studies. In
antibacterial screening performed by disc diffusion method against two gram negative bacteria namely
Xanthomonas campestris (plant pathogen) and Aeromonas hydrophila (animal pathogen), it was found
that the methanol extracts of all the plant samples showed significant activity against the two tested
bacteria. The methanol extracts of S. nigrum, S. torvum and S. surattense exhibited clear zone of
inhibition against the tested micro organisms. Among these three samples, the MIC value of S. surattense,
determined by serial dilution technique, was found to be 32μg/ml and 64μg/ml against Xanthomonas
campestris and Aeromonas hydrophila respectively.
Description
Keywords
MIC, antibacterial activity, gram negative bacteria and plant extracts
Citation
de Britto A John, Gracelin D Herin Sheeba, Kumar P Benjamin Jeya Rathna. Antimicrobial activity of a few medicinal plants against gram negative bacteria. International Journal of Applied Biology and Pharmaceutical Technology. 2011 Jul-Sept; 2(3): 457-461.