Abstract
The diversity of medicinal plants in Vietnam is a rich source to develop novel health products. This study evaluated the antioxidant and antimicrobial activities of ethanolic extracts of Pluchea indica, Drynaria fortunei, Stephania glabra, lemongrass and lime mixture, and ginger and kumquat mixture. The extract of ginger and kumquat mixture showed the highest percentage of free radical scavenging (85% at the concentration of 0.1 mg/ml), following by the extract of P. indica leaves and stem (60%). The plant extracts displayed antibacterial activity against Bacillus cereus, Staphylococcus aureus, and Vibrio parahaemolyticus at different levels in the agar well diffusion assay. The extract of S. glabra inhibited the growth of all bacterial strains. The mean of inhibition zone diameter, produced by S. glabra extract, was similar to or even significantly higher than that of control at particular concentrations.
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