Bacteria (no. of isolates) | Ceftazidime MIC50/90 (µg/ml) | Range | Ceftazidime avibactam MIC50/90 (µg/ml) | Range | Ceftazidime avibactam breakpoints susceptible/resistant (µg/ml) |
Escherichia coli (29) | 96.0/>256 | 8.0->256 | 0.5/1 | 0.016-2 | ≤8/4/≥16/4 |
Klebsiella pneumoniae (13) | 64.0/>256 | 12.0->256 | 1.0/2 | 0.25-2 | ≤8/4/≥16/4 |
Enterobacter species (27) | 32.0/256 | 0.38->256 | 0.5/1.5 | 0.19-3 | ≤8/4/≥16/4 |
Morganella morganii (1) | N/A | 3 | N/A | 3 | ≤8/4/≥16/4 |
Citrobacter species (9) | N/A | 1->256 | N/A | 0.94-1.5 | ≤8/4/≥16/4 |
Acinetobacter species (20) | >256/>256 | 0.75.0->256 | 24.0->256 | 0.75->256 | N/A |
Serratia marcescens (8) | N/A | 1.0->256 | N/A | 0.064-192 | ≤8/4/≥16/4 |
Pseudomonas aeruginosa (24) | 12/24 | 1.5->256 | 3.0/6 | 0.75-8 | ≤8/4/≥16/4 |
Klebsiella pneumoniae ATCC 700603 control | 24 | N/A | 1 | N/A | ≤2/>16 |