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Time-kill curves for VRS1. VRS1 was grown in the absence of antibiotic for 2 h. Antibiotics were added at 0 h. Control (⧫), nafcillin at 25 μg/ml (▴), vancomycin at 30 μg/ml (▪), and nafcillin at 25 μg/ml in combination with vancomycin at 30 μg/ml (×) are shown.
