Table 3. Microorganism/antimicrobial agent combinations showing discrepancy between the results by the direct method and those by the standard method in antimicrobial susceptibility test by Vitek 2.
| Microorganism | N of antibiotics showing discrepancy | ||
|---|---|---|---|
| Very major error (5) | Major error (1) | Minor error (36) | |
| Staphylococcus aureus | Gentamicin (2) | Erythromycin (1) | |
| Staphylococcus epidermidis | Trimethoprim/sulfamethoxazole (2) | Fusidic acid (7) | |
| Gentamicin (4) | |||
| Ciprofloxacin (2) | |||
| Teicoplanin (2) | |||
| Staphylococcus capitis | Gentamicin (1) | Gentamicin (1) | |
| Fusidic acid (1) | |||
| Staphylococcus hominis | Gentamicin (1) | ||
| Staphylococcus haemolyticus | Ciprofloxacin (1) | ||
| Erythromycin (1) | |||
| Enterococcus faecium | Ampicillin/sulbactam (1) | ||
| Enterococcus faecalis | Erythromycin (1) | Erythromycin (2) | |
| Escherichia coli | Amoxicillin/clavulanic acid (2), Piperacillin/tazobactam (1) | ||
| Cefepime (1) | |||
| K. pneumoniae | Amoxicillin/clavulanic acid (1) | ||
| Ertapenem (1) | |||
| Providencia stuartii | Piperacillin/tazobactam (1) | ||
| Imipenem (1) | |||
| Serratia marcescens | Tigecycline (1) | ||
| Pseudomonas aeruginosa | Amikacin (1) | ||
| Cefepime (1) | |||
| Aztreonam (1) | |||