Table 5 |
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|
In vitro susceptibility of 33 strains of Streptococcus uberis obtained from clinical and sub-clinical bovine mastitis cases from the West Littoral Region of Uruguay. |
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| MIC1 (μg/ml) |
% Resistance |
|||||
|
|
|
|||||
| Antimicrobial Agent |
MIC502 |
MIC903 |
Range |
Breakpoint |
VETMIC |
Agar disk diffusion test |
|
|
||||||
| Penicillin |
≤ 0.06 |
0.12 |
≤ 0.06–0.12 |
≥ 4 |
0.0 |
0.0 |
| Ampicillin |
≤ 0.12 |
0.25 |
≤ 0.12–0.25 |
≥ 8 |
0.0 |
0.0 |
| Cephalotin |
≤ 4 |
≤ 4 |
≤ 4 |
≥ 32 |
0.0 |
0.0 |
| Gentamicin |
16 |
> 16 |
≤ 1–> 16 |
≥ 16 |
88.0 |
83.0 5 |
| Erythromycin |
≤ 0.25 |
≤ 0.25 |
≤ 0.25 |
≥ 1 |
0.0 |
0.0 |
| Oxitetracycline |
≤ 0.25 |
0.5 |
≤ 0.25–64 |
≥ 8 |
0.0 |
0.0 6 |
| Trimethoprim/Sulfamethox. |
0.12 |
0.25 |
≤ 0.06–0.5 |
≥ 4 |
0.0 |
....4.... |
|
1 Minimum inhibitory concentration. 2 Lowest concentration inhibiting 50% of the isolated tested. 3 Lowest concentration inhibiting 90% of the isolated tested. 4 Test not performed. 5 No significant differences between methods. 6 Tetracycline disk were used to perform agar disks diffusion. | ||||||
Gianneechini et al. Acta Veterinaria Scandinavica 2002 43:31 doi:10.1186/1751-0147-43-31 |
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