|
In vitro susceptibility of 41 strains of Coagulase Negative Staphylococcus obtained from clinical and sub-clinical bovine mastitis cases from the West Littoral Region of Uruguay. |
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| MIC1(μg/ml) |
% Resistance |
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|
|
|
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| Antimicrobial Agent |
MIC502 |
MIC903 |
Range |
Breakpoint |
VETMIC |
Agar disk diffusion test |
|
|
||||||
| Penicillin |
0.5 |
> 4 |
0.12–> 8 |
≥ 0.25 |
27.0 |
22.0 5 |
| Ampicillin |
0.5 |
2 |
≤ 0.12–> 16 |
≤ 0.5 |
24.4 |
22.0 5 |
| Oxacillin |
≤ 0.5 |
≤ 0.5 |
≤ 0.5–1 |
≥ 4 |
0.0 |
0.0 |
| Cephalotin |
≤ 4 |
≤ 4 |
≤ 4 |
≤ 32 |
0.0 |
0.0 |
| Gentamicin |
≤ 1 |
≤ 1 |
≤ 1–4 |
≥ 16 |
0.0 |
0.0 |
| Erythromycin |
≤ 0.5 |
≤ 0.5 |
≤ 0.5 |
≥ 8 |
0.0 |
0.0 |
| Oxitetracycline |
2 |
> 64 |
≤ 0.25–> 64 |
≥ 16 |
13.9 |
13.9 6 |
| Enrofloxacin |
≤ 0.25 |
≤ 0.25 |
≤ 0.25–0.5 |
≥ 2 |
0.0 |
0.0 |
| Neomycin |
≤ 1 |
≤ 1 |
≤ 1–64 |
≥ 64 |
2.0 |
2.0 |
| Clindamycin |
≤ 1 |
≤ 1 |
≤ 1 |
≥ 4 |
0.0 |
....4.... |
| Amoxicillin/Clavulanic acid |
....4.... |
....4.... |
....4.... |
....4.... |
....4.... |
0.0 |
| Trimethoprim/Sulfamethox. |
0.25 |
0.5 |
< 0.06–8 |
≥ 4 |
7.3 |
0.0 5 |
|
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. 7 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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