Table 1.

Daptomycin MIC distributiona

Daptomycin MIC (μg/ml)No. of isolates at each MIC level (% of total) determined by:
TrekEtestMicroscan
≤0.255 (3.11)44 (27.33)37 (22.98)b
0.3857 (35.40)
0.5118 (73.29)32 (19.88)123 (76.40)
0.7535 (21.74)27 (16.77)
13 (1.86)1 (0.62)1 (0.62)
Essential agreement (%)c97.5297.52
  • a All isolates were tested using the three available daptomycin MIC testing methods at the time of the study.

  • b Data for Microscan are ≤0.25 μg/ml.

  • c Essential agreement is obtained by comparison to custom-made frozen microdilution trays prepared by Trek.