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Soluble farnesol (30 mM) inhibits biofilm formation by Staphylococcus aureus. Staphylococcus aureus was incubated for three hours on titanium alloy discs in the presence of the indicated concentrations of farnesol. Biofilm formation was observed with fluorescence microscopy (magnification, 8×) (A), and the number of viable bacteria was quantified with plate dilution (B). CFU = colony-forming units. Error bars indicate the standard deviation.
