Int. J. Biosci.2(11), 178-183, November 2012
Water chestnut (Trapa quadrispinosa Roxb.) is an annual aquatic herb fruit plant grown in fresh water basin of tropical, sub-tropical and some temperate part of the world. It is called “Singhara” in Bangladesh. The methanol extract of wild variety of water chestnut showed the highest antibacterial performance (zone of inhibition 34mm) against Bacillus megaterium with the doze of 200μg/disc. Whereas, the lowest antibacterial activities (10mm) were recorded for aqua’s extract and petroleum ether extract in comparison to standard antibiotics, kanamycin. Also all gram negative bacterial strains were recorded as resistance in 100μg/disc dose of aqua’s extract. In this disc diffusion assay, the methanol extract of wild variety was found to have a significant antibacterial effect than the other extracts which is in fact put forward the potency to develop a Phyto-medicine against microbes.
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