Table 3.
Minimum inhibitory concentration (MIC) of antibiotics against CoNS isolated from fermented food samples
| Antimicrobial agents | Numbers of CoNS with MICa | Resistant isolates (%) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ≤0.12 | 0.25 | 0.5 | 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128 | ||
| Ampicillin | 24 | 13 | 11 | 62 | 55 | 27 | 0 | 0 | 43 | 18 | 2 | 218 (85.5%) |
| Trimethoprim–sulfomethoxazole | 11 | 37 | 19 | 15 | 0 | 0 | 0 | 0 | 0 | 70 | 103 | 173 (67.8%) |
| Amoxicillin–clavulanic acid | 101 | 0 | 27 | 0 | 0 | 0 | 0 | 0 | 0 | 40 | 87 | 127 (49.8%) |
| Oxacillin | 53 | 136 | 0 | 0 | 0 | 47 | 0 | 0 | 19 | 0 | 0 | 66 (25.9%) |
| Ciprofloxacin | 84 | 43 | 14 | 0 | 52 | 0 | 7 | 24 | 9 | 9 | 13 | 62 (24.3%) |
| Ofloxacin | 21 | 12 | 22 | 69 | 121 | 0 | 0 | 0 | 0 | 0 | 10 | 10 (3.9%) |
| Gentamicin | 15 | 151 | 16 | 26 | 10 | 0 | 21 | 7 | 0 | 0 | 0 | 37 (14.5%) |
| Erythromycin | 98 | 91 | 15 | 0 | 0 | 0 | 0 | 6 | 0 | 40 | 0 | 46 (18.0%) |
| Cefotaximeb | 0 | 181 | 20 | 0 | 0 | 49 | 0 | 0 | 0 | 3 | 2 | – |
aBased on the CLSI breakpoints. MICs indicative for susceptible isolates are displayed on a white background, those for intermediate on a bold and those for resistant on a italics
bSusceptility of staphylococci to cefotaxime may be detected from testing only penicillin and either cefoxitin or oxacillin