TABLE 1.
Results from phenotypic tests from four retrospective isolates that were blaZ carriers but were susceptible to penicillin by BMD
| Isolate | Source | MIC (μg/ml) | Zone diama (mm) |
β-Lactamase test resultb |
||||
|---|---|---|---|---|---|---|---|---|
| P10 | P1 | Zone edge | Nitrocefin broth | Cefinase disc | blaZ PCR | |||
| 632 | Blood | 0.12 | 28 (R) | 22 (R) | Sharp | + | + | + |
| 048 | Blood | 0.06 | 35 (S) | 25 (R) | Sharp | − | − | + |
| 370 | Blood | 0.06 | 30 (S) | 22 (R) | Sharp | − | + | + |
| 320 | Joint fluid | 0.06 | 30 (S) | 22 (R) | Sharp | − | − | + |
a
Interpretations are given in parentheses. R, resistant; S, susceptible.
b
+, positive; −, negative.