TABLE 1.
BD Max StaphSR assay performance compared with phenotypic methicillin (oxacillin and cefoxitin) susceptibility results
| Isolates (no. tested)a (n = 1,807) | Distribution of isolates by BD Max StaphSRb |
|
|---|---|---|
| MRSA | MSSA | |
| MRSA (907) | 904 | 3 |
| MSSA (900) | 8c | 892 |
a
Methicillin-resistant (MRSA) and -susceptible (MSSA) S. aureus clinical isolates defined by the oxacillin and/or cefoxitin susceptibility results obtained by the reference broth microdilution and/or disk diffusion methods according to CLSI guidelines (M02-A12, M07-A10, and M100-S25).
b
Sensitivity and specificity of 99.7% (904/907) and 99.1% (892/900), respectively.
c
Six MSSA isolates were mecA/C positive using an in-house PCR screening assay, and genes were confirmed to be mecA on sequencing analysis. This would provide a corrected specificity of 99.8% (898/900).