Antibacterial Activity of the Essensial Oils of Lempuyang wangi (<i>Zingiber aromaticum </i>Val.), lempuyang gajah (<i>Zingiber zerumbet</i> Sm), and lempuyang emprit (<i>Zingiber amaricans </i>Bl.) on Three Gram Negative Bacteria
The in vitro antibacterial activities of three essential oils of Lempuyang wangi (Zingiber aromaticum Val.), lempuyang gajah (Zingiber zerumbet Sm), and lempuyang emprit (Zingiber amaricans Bl.) has been evaluated against three gram negative bacteria (Pseudomonas sp., Escherichia coli and Salmonella thypii).Â The in vitro antibacterial activity was performed by disc diffusion method and dilution method. the three essential oils inhibited growth of the three gram-negative bacteria with zone of inhibition betweenÂ 8 â€“ 9.8 mm atÂ 5 mg/ml . The MIC of the essential oils was in the range of 0.625 mg/ml â€“ 1,25 mg/mlÂ and the MBC was in range 1.25 mg/ml â€“ 2.5 mg/ml.
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