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Antibiotic susceptibility of Listeria monocytogenes isolates obtained from raw pork meat and inert surfaces from slaughterhouses
| Antibiotic | Breakpoints (mm) | Isolates (number) | ||||
|---|---|---|---|---|---|---|
| S | I | R | S | I | R | |
| Tetracycline | ≥ 19 | 15–18 | ≤ 14 | 20 | 1 | 0 |
| Clarithromycin | ≥ 18 | 14–17 | ≤ 13 | 21 | 0 | 0 |
| Smx/Tpm | ≥ 16 | 11–15 | ≤ 10 | 12 | 8 | 1 |
| Oxacillin | ≥ 18 | ND | ≤ 17 | 0 | 0 | 21 |
| Penicillin G | ≥ 29 | ND | ≤ 28 | 0 | 0 | 21 |
ND means not defined
