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Fluorescence microscopy highlights effects of BN and VCM on S. aureus biofilms (magnification, ×400). Effects of varying concentrations of BN (1/2, 1 and 2 MIC) in the presence and absence of VCM (1/2, 1 and 2 MIC) on mature biofilms were evaluated for 48 h. Biofilms were stained with fluorescein isothiocyanate-conjugated concanavalin A. Scale bars, 20 µm. BN, brazilin; VCM, vancomycin; MIC, minimum inhibitory concentration.
