Journal of Chemical and Pharmaceutical Research (ISSN : 0975-7384)

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Original Articles: 2015 Vol: 7 Issue: 6

Antioxidant activity and exopolysaccharide-expression of pathogenic bacteria treated with Menthaviridis extracts


Natural extracts contain a variety of phenolic compounds which have an antioxidant and antibacterial capacity; they can successfully replace antibiotics that show their inefficiencies against multi-resistant bacteria. In this context, this study was intended as a contribution to the understanding and evaluation of the bioactive potential of methanolic, hydro-methanolic and aqueous extracts of Mentha viridis. The qualitative analysis revealed the presence of polyphenols and flavonoids, which were confirmed-by-quantitative-analysis. The extracts of Mentha viridis expressed an important anti-production activity of the Exopolysaccharides by all pathogens strains. The amount of exopolysaccharides (EPS) produces by bacteria decreased considerably with all extracts comparatively to control (without extracts). The extracts showed strong properties to trap molecules of free radical DPPH with an inhibition power ranging from 45 to 85%.