Main Article Content
The diversity of medicinal plants in Vietnam is a rich source to develop novel health products. In this study, the antioxidant and antimicrobial activities of ethanolic extracts of Pluchea indica, Drynaria fortunei, Stephania glabra, lemongrass (Cymbopogon citratus) and lime (Citrus aurantifolia) mixture, and ginger (Zingiber officinale) and kumquat (Citrus japonica) mixture, were evaluated. The extract of ginger and kumquat mixture exhibited the highest free radical scavenging activity (85%), followed by P. indica and S. glabra (60% and 53%, respectively) at the concentration of 0.1 mg/ml. Moreover, the agar well diffusion assay revealed that the extract of S. glabra and the extract of ginger and kumquat mixture were effective in inhibition against Bacillus cereus, Staphylococcus aureus, and Vibrio parahaemolyticus. Especially, the extract of S. glabra at the concentration of 100 mg/ml showed the highest inhibition zone diameter (13±1.73 mm) against B. cereus, which was significantly larger than that of Ceftriaxone (5 mg/ml) and other extracts.
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