Table 5 Quantitative β-lactamase activity, nitrocefin test and presence of blaZ in randomly selected clinical isolates of BIVR and non-BIVR
| Phenotype | blaZ | Nitrocefin test | β-lactamase (μmol/min/mg protein) | |
|---|---|---|---|---|
| Range | Average ± STD | |||
|
BIVR (n = 5) | - | - | <1 × 10-4 | <1 × 10-4 |
| Non-BIVR (n = 10) | + | + | 1.03 × 10-3 – 4.48 | 0.79 ± 1.84 |
| Non-BIVR (n = 10) | + | - | 2.76 × 10-4– 2.13 × 10-2 | 7.28 × 10-3 ± 1.25 × 10-2 |