Quercus infectoria: a candidate for the control of methicillin‐resistant Staphylococcus aureus infections

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Abstract
Acetone, ethyl acetate, 95% ethanol and aqueous extracts of Quercus infectoria (Q. infectoria) demonstrated significant antibacterial activities against all strains of methicillin‐resistant Staphylococcus aureus (MRSA) and methicillin‐susceptible Staphylococcus aureus (MSSA). Inhibition zones were in the range 11.75–16.82 mm. Both MRSA and MSSA strains exhibited minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) values at 0.13 and 0.13–1.00 mg/mL, respectively. At 2 MIC, the growth of two representative MRSA strains was continually inhibited for at least 20 h. Surviving MRSA cells were not detected within 12–14 h after treatment with the extract at 4 MIC concentration. Staphylococcus aureus ATCC 25923 demonstrated similar results. Copyright © 2008 John Wiley & Sons, Ltd.