Table 5.

Detection of β-lactamases among K. oxytoca by various interpretive criteria

Interpretive criterionaNo. of strains fulfilling interpretive criterion based upon type of β-lactamase
ESBL (n = 3)High K1 (n = 4)Other (n = 6)
N+2 panel
 ≥ 2 Aztreonam340
 ≥ 2 Ceftazidime300
 ≥ 4 Cefotaxime300
 ≥ 4 Ceftriaxone340
 ≥ 4 Ceftizoxime300
NU7 panel
 ≥ 2 Cefpodoxime320
 > 16 Ceftazidime300
 ≥ 8 Ceftriaxone240
  • a Listed as MIC (in micrograms per milliliter) of antibiotic given.