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The antibacterial and anti-biofilm activity of ethanolic extract from the rhizome of Zingiber officinale were evaluated. In vitro antibacterial activity was investigated by microdilution method. Minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) have been determined. The values were in the range from 0.0024 to > 20 mg/ml. The most sensitive bacteria were Gram-positive bacteria: Staphylococcus aureus and Staphylococcus aureus ATCC 25923. Anti-biofilm activity was tested by crystal violet assay. Pseudomonas aeruginosa ATCC 27853, Proteus mirabilis and Escherichia coli ATCC 25922 were used as the test organisms. Ethanolic extract showed the best result on Proteus mirabilis biofilm where biofilm inhibitory concentration (BIC50) was 19 mg/ml.
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Nikolić et al. (2014) studied this question.
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