Table 4.

Detection of β-lactamases among E. coliand K. pneumoniae isolates by various interpretive criteria applied to results obtained in tests with the NU7 panel

Interpretive criterionaNo. of strains fulfilling interpretive criterion based upon type of β-lactamase
ESBL (n = 33)AmpC (n = 8)Other (n = 21)
Cefpodoxime ≥ 23380
Ceftazidime ≥ 42970
Ceftriaxone ≥ 82240
Cefoxitin > 16180
  • a Listed as MIC (in micrograms per milliliter) of antibiotic given.