TABLE 3.
Accuracy of StaphPlex for CoNS species determination directly from positive blood culturea
| Standard identificationb (nc) | No. of isolates with StaphPlex CoNS identificationd
|
||||
|---|---|---|---|---|---|
| S. epidermidis (203) | S. haemolyticus (10) | S. hominis (27) | S. lugdunensis (1) | Other (36) | |
| S. epidermidis (203) | 186 | 0 | 1 | 0 | 16 |
| S. haemolyticus (12) | 0 | 10 | 0 | 0 | 2 |
| S. hominis (34) | 7 | 0 | 25 | 0 | 2 |
| S. lugdunensis (1) | 0 | 0 | 0 | 1 | 0 |
| S. auricularis (1) | 0 | 0 | 0 | 0 | 1 |
| S. capitis (10) | 7 | 0 | 1 | 0 | 2 |
| S. pasteuri (2) | 0 | 0 | 0 | 0 | 2 |
| S. warneri (2) | 1 | 0 | 0 | 0 | 1 |
| “S. pettenkoferi”e (9) | 0 | 0 | 0 | 0 | 9 |
| S. aureus (1) | 1 | 0 | 0 | 0 | 0 |
| Other, nonstaphylococcal species (2) | 1 | 0 | 0 | 0 | 1 |
a
Overall correct identification rate of StaphPlex is 80.1% in comparison to phenotypic identification.
b
API STAPH was used first as the phenotypic identification standard. Specimens with discrepant identifications between API STAPH and StaphPlex were further identified by CDC reference methods (20, 21).
c
n, no. of isolates.
d
Total no. of isolates in each StaphPlex group is given in parentheses.
e
Proposed name.