TABLE 3.
Sensitivities and specificities of commercially available MRSA screening agars
| Agar |
mecA-mediated detection only |
With BORSA criterion ia |
With BORSA criterion iib |
|||
|---|---|---|---|---|---|---|
| Sensitivity | Specificity | Sensitivity | Specificity | Sensitivity | Specificity | |
| BBL CHROMagar MRSA II | 0.89 | 1 | 0.5 | 1 | 0.2 | 1 |
| MRSASelect II | 0.89 | 1 | 0.5 | 1 | 0.2 | 1 |
| chromID MRSA | 0.89 | 1 | 0.5 | 1 | 0.2 | 1 |
| Hardy MRSA screen | 1 | 0.86 | 0.88 | 0.91 | 0.54 | 1 |
| HardyCHROM MRSA | 0.89 | 0.8 | 0.88 | 0.85 | 0.56 | 0.93 |
| Spectra MRSA | 1 | 0.6 | 1 | 0.65 | 0.76 | 0.83 |
a
Resistant or intermediate to oxacillin by disk diffusion.
b
Resistant to oxacillin by gradient diffusion using inducible 2% NaCl agar. There were 102 strains included in this evaluation.