TABLE 2.
Oxacillin MICs and LA test results after overnight induction with an oxacillin disc
| Speciesa | No. of isolates
|
|||
|---|---|---|---|---|
| Total | Oxacillin MIC, ≤0.25 mg/liter | Oxacillin MIC, ≥0.5 mg/liter | Positive LA test result | |
| S. epidermidis | ||||
| mecA + | 153 | 0 | 153 | 153 |
| mecA − | 68 | 68 | 0 | 0 |
| S. haemolyticus | ||||
| mecA + | 25 | 0 | 25 | 25 |
| mecA − | 6 | 6 | 0 | 0 |
| S. hominis | ||||
| mecA + | 47 | 0 | 47 | 47 |
| mecA − | 33 | 33 | 0 | 0 |
| S. capitis subsp. capitis | ||||
| mecA + | 0 | 0 | 0 | 0 |
| mecA − | 8 | 8 | 0 | 0 |
| S. capitis subsp. urealyticus | ||||
| mecA + | 6 | 0 | 6 | 6 |
| mecA − | 4 | 0 | 4 | 0 |
| S. caprae | ||||
| mecA + | 2 | 0 | 2 | 2 |
| mecA − | 6 | 0 | 6 | 0 |
| S. cohnii | ||||
| mecA + | 5 | 0 | 5 | 5 |
| mecA − | 15 | 0 | 15b | 0 |
| S. lugdunensis | ||||
| mecA + | 0 | 0 | 0 | 0 |
| mecA − | 19 | 0 | 19 | 0 |
| S. saprophyticus | ||||
| mecA + | 2 | 0 | 2 | 2 |
| mecA − | 19 | 0 | 19 | 0 |
| S. schleiferi | ||||
| mecA + | 0 | 0 | 0 | 0 |
| mecA − | 10 | 10 | 0 | 0 |
| S. simulans | ||||
| mecA + | 5 | 0 | 5 | 5 |
| mecA − | 5 | 3 | 2c | 1 |
| S. warneri | ||||
| mecA + | 6 | 0 | 6 | 6 |
| mecA − | 8 | 1 | 7 | 0 |
| S. xylosus | ||||
| mecA + | 0 | 0 | 0 | 0 |
| mecA − | 11 | 0 | 11 | 0 |
| Total | 463 | |||
| mecA + | 251 | 0 | 251 | 251 |
| mecA − | 212 | 129 | 83 | 1 |
a
mecA +, mecA positive; mecA −, mecA negative.
b
For one strain the oxacillin MIC was 4 mg/liter.
c
The oxacillin MICs for one these strains were >4 mg/liter.