Table 1.
Susceptibility (IZD) of Aeromonas spp. to antibiotics.
| IZD (mm) | |||||||
|---|---|---|---|---|---|---|---|
| Antibiotic | A. hydrophila | A. salmonicida | Breakpoint (mm) | ||||
| 12 h | 24 h | 12 h | 24 h | R | I | S | |
| G | 16.4 (S) | 16.2 (S) | 17.33 (S) | 17.1 (S) | ≤12 | 13–14 | ≥15 |
| Ch | 22.68 (S) | 22.18 (S) | 25.15 (S) | 22.58 (S) | ≤12 | 13–17 | ≥18 |
| K | 24.65 (S) | 24.08 (S) | 27.48 (S) | 26.1(S) | ≤13 | 14–17 | ≥18 |
| DOX | 22.7 (S) | 22.1 (S) | 13.8 (R) | 10.7 (R) | <17 | 17–18 | ≥19 |
| P/S | 12.75 (I) | 12.2 (I) | 13.88 (I) | 13.87 (I) | ≤11 | 12–14 | ≥15 |
| CT | 10.53 (I) | 10.4 (I) | 9.23 (R) | 8.78 (R) | ≤10 | - | ≥11 |
| RD | 14.08 (R) | 11.85 (R) | 14.93 (R) | 12.93 (R) | ≤16 | 17–19 | ≥20 |
| E | 12.63 (R) | 10.33 (R) | 12.78 (R) | 12.53 (R) | ≤13 | 14–22 | ≥23 |
| VA | 0 (R) | 0 (R) | 0 (R) | 0 (R) | - | - | ≥15 |
| P | 0 (R) | 0 (R) | 0 (R) | 0 (R) | ≤28 | - | ≥29 |
Abbreviations: G, gentamicin; Ch, chloramphenicol; K, kanamycin; DOX, doxycycline; P/S, penicillin-streptomycin; CT, colistin; RD, rifampicin; E, erythromycin; VA, vancomycin; P, penicillin; R, resistant; I, intermediate; S, susceptible; (0), means no inhibition zone around the disc on the plate; (-), not determined.