Table 2.
Antimicrobial susceptibility of S. a u r e u s and C N S strains isolated from goats subclinical mastitis.
| S. aureus | CNS | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Antimicrobial | MIC (μg/mL) | Susceptible | Intermediate | Resistant | Susceptible | Intermediate | Resistant | ||||||
| agents | breakpoints | n | % | n | % | n | % | n | % | n | % | n | % |
| Ampicillin (a) | ≤0.25–≥0.5 | 22 | 88.0 | – | – | 3 | 12.0 | 48 | 64.0 | – | – | 27 | 36.0 |
| Cefoperazone (b) | ≤16.0–≥64.0 | 25 | 100.0 | – | – | – | – | 74 | 98.7 | 1 | 1.3 | – | – |
| Ceftriaxone (b) | ≤8.0–≥64.0 | 23 | 92.0 | 2 | 8.0 | – | – | 73 | 97.3 | 1 | 1.3 | 1 | 1.3 |
| Cephalothin (a) | ≤8.0–≥32.0 | 24 | 96.0 | – | – | 1 | 4.0 | 74 | 98.7 | 1 | 1.3 | – | – |
| Cloxacillin (a) | ≤2.0–≥4.0 | 25 | 100.0 | — | — | – | – | 73 | 97.3 | — | — | 2 | 2.7 |
| Kanamycin (a) | ≤16.0–≥64.0 | 15 | 60.0 | 3 | 12.0 | 7 | 28.0 | 59 | 78.7 | 11 | 14.7 | 5 | 6.7 |
| Novobiocin (c) | ≤4.0 | 25 | 100.0 | — | — | – | – | 73 | 97.3 | — | — | 2 | 2.7 |
| Ofloxacin (b) | ≤1.0–≥4.0 | 23 | 92.0 | 2 | 8.0 | – | – | 71 | 94.7 | 1 | 1.3 | 3 | 4.0 |
| Oxytetracycline (a) | ≤4.0–≥16.0 | 21 | 84.0 | – | – | 4 | 16.0 | 71 | 94.7 | – | – | 4 | 5.3 |
| Vancomycin (a) | ≤4.0–≥32.0 | 25 | 100.0 | – | – | – | – | 75 | 100.0 | – | – | – | – |