Table 2.
MIC, MIC50, MIC90, and resistance rate distributions for investigated of 35 C. jejuni strains in biofilm and planktonic forms.
| Antibiotics (mg/L) | CIPPL | CIPBF | COLPL | COLBF | TETPL | TETBF | ERYPL | ERYBF | MERPL | MERBF |
|---|---|---|---|---|---|---|---|---|---|---|
| <0.125 | 01 | – | – | – | 04 | – | 08 | – | 10 | – |
| 0.125 | 01 | – | – | – | – | – | – | – | 05 | – |
| 0.25 | 02 | – | 02 | – | 01 | – | 04 | – | 05 | – |
| 0.5 | – | – | 03 | – | – | – | 06 | – | 01 | – |
| 1 | 01 | - | 02 | – | – | 02 | 01 | – | 02 | – |
| 2 | 01 | - | – | – | – | 01 | 02 | – | 03 | – |
| 4 | 03 | - | 01 | - | 03 | 01 | 02 | – | 03 | – |
| 8 | 01 | - | - | - | 01 | 02 | – | – | 03 | – |
| 16 | 02 | - | 01 | - | 06 | 02 | 02 | - | - | - |
| 32 | 03 | - | 04 | 01 | 06 | 02 | 01 | 01 | 02 | - |
| 64 | 02 | - | - | 02 | 07 | 03 | 02 | - | 01 | - |
| 128 | 02 | 03 | 03 | 03 | 01 | 08 | 03 | - | - | 02 |
| 256 | 06 | 11 | 02 | 04 | 01 | 03 | 04 | 07 | - | 06 |
| >256 | 10 | 21 | 17 | 25 | 05 | 11 | - | 27 | - | 27 |
| Total Resistant n (%) |
31 (88.6) |
35 (100) |
28* (80) |
35* (100) |
30 (85.7) |
32 (91.4) |
12** (34.3) |
35** (100) |
03** (8.6) |
35** (100) |
| Total Resistant ≥32 – n (%) | 23* (65.7) |
35* (100) |
26* (74.3) |
35* (100) |
20 (57.1) |
27 (77.1) |
10** (28.6) |
35** (100) |
03** (8.6) |
35** (100) |
| MIC50 | 128 | >256 | 256 | >256 | 32 | 128 | 0.5 | >256 | 0.25 | >256 |
| MIC90 | >256 | >256 | >256 | >256 | >256 | >256 | 256 | >256 | 8 | >256 |
PL, planktonic form; BF, biofilm form; CIP, ciprofloxacin; COL, colistin; TET, tetracycline; ERY, erytromycin; MER, meropenem; ___, breakpoint (EUCAST, 2020); n = resistant strains number; % = Resistance rate; *p < 0.05, **p < 0.0001 using Fisher’s exact test.