TABLE 3.
Specimen no. | Initial culture identification | Repeat culture identification at:
|
Initial StaphSR PCR result for:
|
Repeat StaphSR PCR result for:
|
Isolate analysis
|
||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
JHH | GeneOhm | S. aureus | MRSA | S. aureus | MRSA | StaphSR PCR result for:
|
Phoenix OX MIC (μg/ml)b | Result of PBP2′ assay | Result of mecA PCR | Final assignment | |||
S. aureus | MRSA | ||||||||||||
7903 | CoNS | No S. aureus | No S. aureus | Pos | Neg | Posc | Negc | Neg | Neg | ND | ND | ND | False-pos for S. aureus |
8409 | CoNS | No S. aureus | No S. aureus | Pos | Neg | Posc | Negc | Neg | Neg | ND | ND | ND | False-pos for S. aureus |
8433 | CoNS | No S. aureus | No S. aureus | Pos | Neg | Pos | Negc | Neg | Neg | ND | ND | ND | False-pos for S. aureus |
8452 | CoNS | No S. aureus | No S. aureus | Pos | Neg | Negc | Negc | ND | ND | ND | ND | ND | False-pos for S. aureus |
8455 | CoNS | No S. aureus | No S. aureus | Pos | Neg | Negc | Negc | ND | ND | ND | ND | ND | False-pos for S. aureus |
7052 | CoNS | No S. aureus | No S. aureus | Neg | Pos | Negc | Negc | ND | ND | ND | ND | ND | False-pos for MRSA |
8445 | CoNS | No S. aureus | No S. aureus | Pos | Pos | Posc | Negc | Neg | Neg | ND | ND | ND | False-pos for MRSA |
7054 | S. aureus | ND | S. aureus | Neg | Neg | Negc | Negc | Pos | Neg | 0.5 | Neg | ND | False-neg |
7083 | S. aureus | S. aureus | S. aureus | Pos | Pos | Posc | Posc | Pos | Pos | 0.5 | Neg | Neg | False-pos for MRSA |
7987 | S. aureus | S. aureus | S. aureus | Pos | Pos | Posc | Posc | Pos | Pos | 0.5 | Neg | Neg | False-pos for MRSA |
JHH, Johns Hopkins Hospital; GeneOhm, BD GeneOhm Canada; Pos, positive; Neg, negative; OX, oxacillin; PBP2′, penicillin binding protein 2′; ND, not done.
Phoenix MICs were corroborated by Etest MICs of oxacillin and cefoxitin and by failure to grow on oxacillin screening agar plates. See the text for values.
Testing was repeated at BD GeneOhm Canada with concordant results.