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 clinically
important bacteria viz. Alcaligenes faecalis ATCC8750, Bacillus cereus
ATCC11778, Bacillus subtilis ATCC6633, Enterobacter aerogenes
ATCC13048, Escherichia coli ATCC25922, Klebsiella pneumoniae
NCIM2719, Proteus mirabilis NCIM224, Proteus vulgaris NCTC8313,
Pseudomonas aeruginosa ATCC27853, Pseudomonas pseudoalcaligenes
ATCC17440, Salmonella typhimurium ATCC23564, Staphylococcus
aureus ATCC25923, Staphylococcus epidermidis ATCC12228,
Staphylococcus subfava NCIM2704 and Candida tropicalis ATCC4563.
The in vitro antimicrobial activity was performed by agar disc diffusion
and agar well diffusion method. The ethanolic extracts of all the plants
were active against all the investigated bacterial strains while all the
aqueous extracts were inactive except for Vitis vinifera L. S. typhimurium
was 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.