In-vitro antimicrobial activities of extracts of Launaea procumbens roxb. (Labiateae), Vitis vinifera l. (Vitaceae) and Cyperus rotundus l. (Cyperaceae

Abstract

The aqueous and ethanolic extracts of Launaea procumbens Roxb.(Labiateae), Vitis vinifera L. (Vitaceae) and Cyperus rotundus L.(Cyperaceae) were evaluated for antimicrobial activity against clinicallyimportant bacteria viz. Alcaligenes faecalis ATCC8750, Bacillus cereusATCC11778, Bacillus subtilis ATCC6633, Enterobacter aerogenesATCC13048, Escherichia coli ATCC25922, Klebsiella pneumoniaeNCIM2719, Proteus mirabilis NCIM224, Proteus vulgaris NCTC8313,Pseudomonas aeruginosa ATCC27853, Pseudomonas pseudoalcaligenesATCC17440, Salmonella typhimurium ATCC23564, Staphylococcusaureus ATCC25923, Staphylococcus epidermidis ATCC12228,Staphylococcus subfava NCIM2704 and Candida tropicalis ATCC4563.The in vitro antimicrobial activity was performed by agar disc diffusionand agar well diffusion method. The ethanolic extracts of all the plantswere active against all the investigated bacterial strains while all theaqueous extracts were inactive except for Vitis vinifera L. S. typhimuriumwas the most resistant bacterial strain against all the extracts (Afr. J.Biomed. Res. 9:89 – 93, May 2006)Keywords: antimicrobial activity, aqueous extract, ethanolic extract, Launaea procumbens Roxb., Vitis vinifera L. and Cyperus rotundus L.