Table 2.
Antimicrobial resistance and antimicrobial sensitivity of Salmonella isolates (n = 209)
| Antimicrobial | Resistancea (%) | MIC50 (μg/mL) | MIC90 (μg/mL) |
|---|---|---|---|
| Ampicillin | 26.8 | 2 | > 64 |
| Ticarcillin | 27.3 | 4 | > 128 |
| Amoxicillin-clavulanic acid | 9.6 | 1/0.5 | 16/8 |
| Cephalothin | 8.1 | 4 | 16 |
| Ceftiofur | 1.0 | 0.5 | 1 |
| Ceftriaxone | 0.0 | 0.25 | 0.25 |
| Amikacin | 0.0 | 4 | 4 |
| Apramycin | 0.0 | 2 | 4 |
| Gentamicin | 7.7 | 0.5 | 1 |
| Kanamycin | 9.6 | 16 | 16 |
| Streptomycin | 32.5 | 32 | 128 |
| Nalidixic acid | 0.5 | 4 | 4 |
| Ciprofloxacin | 0.0 | 0.015 | 0.015 |
| Sulfamethoxazole | 28.7 | 128 | > 512 |
| Trimethoprim-sulfamethoxazole | 1.0 | 0.12/2.38 | 0.25/4.75 |
| Tetracycline | 35.4 | 4 | > 64 |
| Chloramphenicol | 12.9 | 8 | > 32 |
a Breakpoints for resistance (μg/mL): ampicillin, ≥32; ticarcillin, ≥128; amoxicillin-clavulanic acid, ≥32/16; cephalothin, ≥32; ceftiofur, ≥8; ceftriaxone, ≥64; amikacin, ≥64; apramycin, ≥32; gentamicin, ≥16; kanamycin, ≥64; streptomycin, ≥64; nalidixic acid, ≥32; ciprofloxacin, ≥4; sulfamethoxazole, ≥512; trimethoprim-sulfamethoxazole, ≥4/76; tetracycline, ≥16; chloramphenicol, ≥32
MIC — Minimum inhibitory concentration