(b).
| Antimicrobial agent | Number of very major errors (%) | Number of major errors (%) | Number of minor errors (%) | AST agreement (%) | Total |
|---|---|---|---|---|---|
| Gram-negatives | |||||
| Ampicillin/sulbactam | 0/27 | 3/7 (42.9) | 0/34 | 31/34 (91.2) | 34 |
| Piperacillin/tazobactam | 2/15 (13.3) | 3/28 (10.7) | 4/46 (8.7) | 37/46 (80.4) | 46 |
| Cefazoline | 0/1 | 0/0 | 0/1 | 1/1 (100.0) | 1 |
| Cefepime | 0/13 | 1/30 (3.3) | 6/46 (13.0) | 39/46 (84.8) | 46 |
| Ceftazidime | 0/15 | 1/28 (3.6) | 2/45 (4.4) | 42/45 (93.3) | 45 |
| Cefotaxime∗ | 0/0 | 0/1 | 0/1 | 1/1 (100.0) | 1 |
| Ertapenem | 1/9 (11.1) | 0/35 | 1/44 (2.3) | 42/44 (95.5) | 44 |
| Meropenem | 1/9 (11.1) | 0/37 | 5/46 (10.9) | 40/46 (87.0) | 46 |
| Gentamicin | 0/7 | 3/38 (7.9) | 1/45 (2.2) | 41/45 (91.1) | 45 |
| Amikacin | 0/9 | 0/33 | 5/46 (10.9) | 41/46 (89.1) | 46 |
| Tobramycin | 0/0 | 0/2 | 0/2 | 2/2 (100.0) | 2 |
| Ciprofloxacin | 0/22 | 0/22 | 2/46 (4.4) | 44/46 (95.7) | 46 |
| Colistin | 0/5 | 2/38 (5.3) | 0/43 | 41/43 (95.4) | 43 |
| Total | 4/132 (3.0) | 13/299 (4.4) | 26/445 (5.8) | 402/445 (90.3) | 445 |