Antimicrobial potential of Parthenium hysterophorus Linn. plant extracts.
Parthenium hysterophorus Linn. (Asteraceae) is an aggressive and exotic weed plant reported to be used as remedy for various diseases. Aqueous and ethanolic extracts obtained from various parts of P. hysterophorus Linn. were evaluated for antimicrobial activity against three bacterial strains (Staphylococcus aureus MTCC 3160, Bacillus cereus MTCC 1272, Escherichia coli MTCC 43) and three fungal strains (Candida albicans MTCC 3017, Aspergillus flavus MTCC 277, Saccharomyces cerevisiae MTCC 36). Alcoholic extracts exhibited varying degree of antifungal activity, Root extract was able to inhibit only Aspergillus flavus MTCC 277 with zone of inhibition 9.0±0.0 mm, stem extract were able to inhibit Candida albicans MTCC 3017 and Saccharomyces cerevisiae MTCC 36 with zone of inhibition 7.0±1.0 mm and 15±1.0 mm respectively. Leaf extract was able to inhibit Bacillus cereus MTCC 1272, Candida albicans MTCC 3017, Aspergillus flavus MTCC 277 and Saccharomyces cerevisiae MTCC 36, with zone of inhibitions 11±1.0 mm, 13±1.5 mm, 11±1.5 mm and 14±1.5 mm respectively.