TABLE 6.
Comparison of MICs generated by the VITEK 2 method (P534 cards) with MICs generated by the reference microbroth dilution method for 121 enterococcia
| Drug | No. of VITEK 2 MICs that differed from reference MICs by the following dilution:
|
EA (no. [%]) | No. (%) of minor errors | ||||||
|---|---|---|---|---|---|---|---|---|---|
| −3 | −2 | −1 | Concordant | +1 | +2 | +3 | |||
| Vancomycin | 3 | 104 | 7 | 6 | 1 | 113 (94.2) | 6 (5) | ||
| Teicoplanin | 1 | 3 | 10 | 99 | 7 | 1 | 116 (95.9) | 11 (9) | |
| Quin-dalfo | 4 | 84 | 33 | 121 (100) | 6 (5) | ||||
| Linezolid | 1 | 3 | 100 | 15 | 2 | 118 (97.5) | 6 (5) | ||
| Moxifloxacin | 12 | 108 | 1 | 121 (100) | 6 (5) | ||||
a
Dilutions indicate the number of VITEK 2 MIC dilutions compared to reference microbroth dilution MICs. EA, essential agreement (present VITEK 2 MICs within 1 dilution of reference MICs); minor error, intermediate by either the VITEK 2 or reference method and either susceptible or resistant by the other method. There were no major or very major errors. Quin-dalfo, quinupristin-dalfopristin.