Evaluation of antibacterial effects of some plant extracts and essential oils against Vibrio parahaemolyticus

In this study the antibacterial effects of ethanolic extract of eight medicinal plants (Artemisia aucheri, Satureja bachtiarica, Tanacetum parthenium, Cuminum cyminum, Salvia officinalis, Achillea kellalensis, Stachys lavandulifolia, Myrtus communis) and the essential oil of Satureja bachtiarica, Artemisia aucheri, Tanacetum parthenium, Cuminum cyminum, Achillea kellalensis, Myrtus communis on Vibrio parahaemolyticus were evaluated. Standard tube dilution method was used for evaluation of Minimum Bactericidal Concentration value (MBC) and Minimum Inhibitory Concentration value (MIC) of each plant. Then inhibitory zone of bacterial growth for each plant was also measured and compared to positive and negative control. The results showed that the extracts of Satureja bachtiarica had the highest antibacterial effects on V. parahaemolyticus with the inhibitory bacterial growth zone of 15 mm. The extract of Tanacetum parthenium and Cuminum cyminum were also effective with the inhibitory bacterial growth zone of 14 and 11.67 mm against V. parahaemolyticus. Other herbal extract showed no antibacterial effects. The results revealed the higher antibacterial effects of essential oils comparing to the extracts and the highest antibacterial effect were belonged to Satureja bachtiarica, Tanacetum parthenium and Cuminum cyminum. It can be concluded that regarding to high antibacterial effect of Satureja bachtiarica, Tanacetum parthenium and Cuminum cyminum, they can be used in elimination of V. parahaemolyticus.