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Time-kill curves showing the effects of unsupplemented Iso-Senstitest broth (control) and broth supplemented with either colistin (1 μg/ml), vancomycin (20 μg/ml), or both for epidemic strains AB11, AB14, AB16, AB184, and AB186 by viable colony counts. Symbols: ×, control; □, vancomycin; ▴, colistin; •, vancomycin plus colistin.
