TABLE 6.
Intralaboratory reproducibility for agar dilution and broth microdilution methods by laboratory Aa
| Antimicrobial agent | Agar dilution
|
Broth microdilution
|
||||||
|---|---|---|---|---|---|---|---|---|
| 0 | ±1 | ±2 | >±2 | 0 | ±1 | ±2 | >±2 | |
| Amikacin | 67 | 18 | 0 | 5 | 72 | 13 | 2 | 3 |
| Gentamicin | 80 | 6 | 0 | 4 | 80 | 5 | 0 | 5 |
| Tobramycin | 74 | 10 | 0 | 6 | 76 | 12 | 1 | 1 |
| Ciprofloxacin | 81 | 9 | 0 | 0 | 76 | 14 | 0 | 0 |
| Piperacillin | 78 | 9 | 0 | 3 | 77 | 12 | 1 | 0 |
| Ticarcillin | 77 | 10 | 3 | 0 | 81 | 9 | 0 | 0 |
| Piperacillin-tazobactam | 78 | 12 | 0 | 0 | 77 | 12 | 1 | 0 |
| Ticarcillin-clavulanate | 75 | 15 | 0 | 0 | 79 | 10 | 1 | 0 |
| Ceftazidime | 74 | 16 | 0 | 0 | 82 | 8 | 0 | 0 |
| Aztreonam | 69 | 21 | 0 | 0 | 78 | 10 | 2 | 0 |
| Imipenem | 77 | 9 | 1 | 3 | 82 | 7 | 1 | 0 |
| Meropenem | 81 | 9 | 0 | 0 | 75 | 10 | 5 | 0 |
| Total | 911 | 144 | 4 | 21 | 935 | 122 | 14 | 9 |
a
There were 2,160 comparisons. The number of variations is provided.