Antimicrobial Agent | Minimal Inhibitory Concentrations | ||||
---|---|---|---|---|---|
 | Breakpoint* (mg/L) | Range (mg/L) | MIC50 # (mg/L) | MIC90 # (mg/L) | Resistant strains (%) |
Tetracycline | S ≤ 2; R ≥ 8 | 0.125-->256 | 24 | 32 | 88.6 |
Erythromycin | S ≤ 0.25; R ≥ 1 | 0.016-- >256 | 0.064 | >256 | 22.2 |
Chloramphenicol | S ≤ 4; R ≥ 16 | 0.5-96 | 3 | 4 | 8.6@ |
Penicillin | S ≤ 0.12; R ≥ 4 | 0.012-0.064 | 0.032 | 0.047 | 0 |
Ceftriaxone | S ≤ 0.5 | 0.025-0.38 | 0.094 | 0.125 | 0 |
Vancomycin | S ≤ 1 | 0.25-0.5 | 0.38 | 0.5 | 0 |