TABLE 2.
Strain(s) | No. of strains with false-positive S. aureus identification usinga:
|
||
---|---|---|---|
CSAMb | CSAMb + Pastorex Staph Plus test | CSAMb + Staphychrom coagulase test | |
Micrococcus spp. | 2 | 0 | 0 |
Staphylococcus epidermidis | 3 | 0 | 0 |
Staphylococcus simulans | 3c | 3c | 0 |
Staphylococcus intermedius | 1 | 1 | 0 |
Staphylococcus warneri | 1 | 1 | 0 |
Staphylococcus schleiferi | 1 | 1 | 0 |
Other coagulase-negative Staphylococcus spp. | 4 | 0 | 0 |
Total | 15 | 6 | 0 |
Specificities were the following: for CSAM, 97%; for CSAM + Pastorex Staph Plus test, 98.8%; for CSAM + Staphychrom coagulase test, 100%.
Mauve colony and suggestive Gram staining, but not an S. aureus strain.
These three strains were isolated from different specimens from the same patient.