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Table 1 Enterobacteriaceae (216 strains): results of GDM versus BMD as the reference method

From: Gradient diffusion antibiogram used directly on bronchial aspirates for a rapid diagnosis of ventilator-associated pneumonia

Antibiotic/methodRangeMIC 50MIC 90Susceptible (%)Intermediate (%)Resistant (%)KappaMinor error (%)Major and very major error (%)
Ceftazidime GDM0.016- > 2560.2532186 (86.1)6 (2.8)24 (11.1)88.85 (2.3)1 (0.5)
Ceftazidime BMD< 0.06- > 320.2532185 (85.6)5 (2.3)26 (12.0)
Ceftolozane-tazobactam GDM0.023- > 2560.251.5197 (91.2)6 (2.8)13 (6.0)91.13 (1.4)
Ceftolozane-tazobactam BMD< 0.06- > 320.251199 (92.1)5 (2.3)12 (5.6)
Meropenem GDM< 0.002- > 320.0320.125209 (96.8)1 (0.5)6 (2.8)92.61 (0.5)
Meropenem BMD< 0.06- > 32< 0.061209 (96.8)7 (3.2)
Doripenem GDM< 0.002- > 320.0640.25209 (96.8)7 (3.2)100
Doripenem BMD< 0.06- > 32< 0.060.5209 (96.8)7 (3.2)
  1. Range, MIC 50 and MIC 90 are given in mg/mL. GDM = gradient diffusion method, BMD = broth microdilution method