A comparative study on the antimicrobial properties of extracts from medicinal plants obtained by two different methods was carried out. The screening of the antimicrobial activity of extracts from six plants was conducted by a disc diffusion test against Gram-positive,-negative and fungal organisms. The most active extracts(inhibition diameters 12 mm) were assayed for the minimum inhibitory concentration and submitted to phytochemical screening by thin-layer chromatography and bioautography. The results obtained indicate that the diethylether extracts were the most efficient antimicrobial compounds.The activity was more pronounced against Gram-positive and fungal organisms than against Gram-negative bacteria. Bioautography showed that the antimicrobial activity was probably due to flavonoids and terpenes.
Extraction methods and bioautography for evaluation of medicinal plant antimicrobial activity
NOSTRO, Antonia;GERMANO', Maria Paola;D'ANGELO, Valeria;MARINO, Andreana;
2000-01-01
Abstract
A comparative study on the antimicrobial properties of extracts from medicinal plants obtained by two different methods was carried out. The screening of the antimicrobial activity of extracts from six plants was conducted by a disc diffusion test against Gram-positive,-negative and fungal organisms. The most active extracts(inhibition diameters 12 mm) were assayed for the minimum inhibitory concentration and submitted to phytochemical screening by thin-layer chromatography and bioautography. The results obtained indicate that the diethylether extracts were the most efficient antimicrobial compounds.The activity was more pronounced against Gram-positive and fungal organisms than against Gram-negative bacteria. Bioautography showed that the antimicrobial activity was probably due to flavonoids and terpenes.Pubblicazioni consigliate
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