Table 2.

Broth microdilution susceptibilities and MIC distributions for all 107 single-patient A. baumannii-calcoaceticus complex isolates and for isolates by the presence or absence of the blaOXA-23-like gene

AgentResult for isolatesa:
TotalWith the blaOXA-23-like geneWithout the blaOXA-23-like gene
MIC (μg/ml)% SMIC (μg/ml)% SMIC (μg/ml)% S
50%90%50%90%50%90%
Imipenem≥16≥1637.4≥16≥1604≥1678.4
Meropenem≥16≥1635.5≥16≥1604≥1672.5
Doripenemb≥16≥163.7≥16≥1604≥163.7
  • a Among the total number of isolates, 56 (52.3%) had the blaOXA-23-like gene and 51 (47.7%) lacked it. S, susceptible.

  • b FDA breakpoints were applied (≤1 μg/ml).