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Antimicrobial susceptibility breakpoints used to determine the antimicrobial susceptibility (S), intermediate (I), and resistance (R) of Streptococcus uberis.
| Antimicrobial | Breakpoint (μg/mL) | References | ||
|---|---|---|---|---|
| S | I | R | ||
| Penicillin G | ≤ 0.12 | 0.25–2 | ≥4 | CLSI VET08 ED4 (25) |
| Gentamycin | ≤ 4 | 8 | ≥16 | CLSI M31-A3 (26) |
| Erythromycin | ≤ 0.25 | 0.5 | ≥1 | CLSI VET08 ED4 (25) |
| Tetracycline | ≤ 2 | 4 | ≥8 | CLSI VET08 ED4 (25) |
| Ceftiofur | ≤ 2 | 4 | ≥8 | CLSI VET08 ED4 (25) |
CLSI, clinical and laboratory standards institute.
