Figure 2.

Performance of Etest and Vitek2 compared to broth microdilution for vancomycin minimum inhibitory concentration (MIC). Data adapted from van Hal et al [25] with permission (Oxford University Press). Test results are interpreted compared to broth microdilution as the gold standard. Of note, although the correlation between MIC results differs significantly between methodologies, both these assays perform adequately with respect to regulatory agencies as the overall agreement is >95% (ie, an accepted variance of ±1 dilution). Abbreviation: MIC, minimum inhibitory concentration.