Table 2.
Disk content and EUCAST breaking points of each antibiotic tested for specific indicator bacteria.
| Antibiotic class | Antibiotic | Code | Content (µg) | E. coli | Enterococci spp. | P. aeruginosa | Aeromonas spp. | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| <R | ≥S | <R | ≥S | <R | ≥S | R | S | ||||
| β-lactams | Ampicillin∗ | AMP | 10|2 | 14 | 14 | 8 | 10 | IR | NR | ||
| Amoxicillin/Clav | AMC30 | 20/10 | 19 | 19 | IR | NR | |||||
| Cephalosporin | Ceftazidime | CAZ30 | 10 | 19 | 22 | IR | 17 | 17 | 21 | 24 | |
| Cefepime | CFP | 30 | 24 | 27 | IR | 21 | 21 | 24 | 27 | ||
| Aminoglycosides | Gentamicin∗ | GEN10 | 10|30 | 14 | 17 | 8 | 8 | 15 | 15 | NR | |
| Amikacin | AMIK | 30 | 15 | 18 | 15 | 18 | NR | ||||
| Fluoroquinolone | Levofloxacin | LVL5 | 5 | 23 | 19 | 15 | 15 | 22 | 22 | 24 | 27 |
| Ciprofloxacin | CIP5 | 5 | 24 | 26 | 15 | 15 | 26 | 26 | 24 | 27 | |
| Carbapenem | Meropenem | MRP10 | 10 | 16 | 22 | NR | 18 | 24 | |||
| Sulfonamides | Co-Trimoxazole | SxT25 | 1.25/23.75 | 11 | 14 | 23 | 23 | NR | 16 | 19 | |
IR: intrinsically resistant, NR: not recommended. ∗We have used two types of ampicillin and gentamicin disk for AST of E. coli and Enterococci spp.