Table 3.
Prevalence in beta-lactamase production (β±) among staphylococci (S.) isolates from cases of subclinical mastitis in dairy cows in peri-urban areas of Kigali in Rwanda
| Total isolates | Positive | β+ (%) | Negative | β− (%) | |
|---|---|---|---|---|---|
| S. aureus | 89 | 78 | 87.6 | 11 | 12.4 |
| S. epidermis | 46 | 34 | 73.9 | 12 | 26.1 |
| S. sciuri | 23 | 12 | 52.2 | 11 | 47.8 |
| S. chromogenes | 9 | 6 | 66.7 | 3 | 33.3 |
| S. xylosus | 9 | 9 | 100 | 0 | 0.0 |
| S. captis | 8 | 5 | 62.5 | 3 | 37.5 |
| S. haemolyticus | 8 | 6 | 75.0 | 2 | 25.0 |
| S. pasteuri | 8 | 7 | 87.5 | 1 | 12.5 |
| S. saprophyticus | 4 | 2 | 50.0 | 2 | 50.0 |
| S. devriesei | 2 | 1 | 50.0 | 1 | 50.0 |
| S. kloosii | 1 | 0 | 0.0 | 1 | 100 |
| S. lugdunensis | 1 | 0 | 0.0 | 1 | 100 |
| S. warneri | 1 | 1 | 100 | 0 | 0.0 |
| Total | 209 | 161 | 77.0 | 48 | 23.0 |