TABLE 2.
Evaluation of QuickFISH, BC-GP, and MALDI-TOF MS for 146 monomicrobial cultures
| Definitive ID | No. of cultures | No. (%) of cultures correctly identified by: |
|||
|---|---|---|---|---|---|
| MALDI-TOF MS (%) |
QuickFISH (%) | BC-GP (%) | |||
| Genus (>1.6) | Species (>1.8) | ||||
| Staphylococci | 58 | 57 (98.3) | 51 (87.9) | 57 (98.3) | 58 (100) |
| CoNSa | 45 | 44 (97.8) | 38 (84.4) | 44 (97.8) | 45 (100) |
| S. aureus | 13 | 13 (100) | 13 (100) | 13 (100) | 13 (100) |
| mecA | 3 | 3 (100) | |||
| Enterococci | 16 | 16 (100) | 16 (100) | 16 (100) | 16 (100) |
| E. faecium | 9 | 9 (100) | 9 (100) | 9 (100) | 9 (100) |
| E. faecalis | 7 | 7 (100) | 7 (100) | 7 (100) | 7 (100) |
| vanA | 6 | 4 (66.7) | |||
| Streptococci | 14 | 7 (50) | 6 (42.9) | 14 (100) | 12 (85.7) |
| Viridans streptococci | 7 | 1 (14.3) | 1 (14.3) | NDb (100) | 5 (71.4) |
| S. pyogenes | 2 | 2 (100) | 2 (100) | ND (100) | 2 (100) |
| S. anginosus group | 2 | 2 (100) | 1 (50) | ND (100) | 2 (100) |
| S. pneumoniae | 1 | 0 (0) | 0 (0) | ND (100) | 1 (100) |
| S. agalactiae | 1 | 1 (100) | 1 (100) | ND (100) | 1 (100) |
| S. dysgalactiae (group G) | 1 | 1 (100) | 1 (100) | ND (100) | 1 (100) |
| Other | 7 | 5 (71.4) | 4 (57.1) | 7 (100) | 7 (100) |
| Micrococcus spp. | 3 | 1 (33.3) | 1 (33.3) | ND (100) | ND (100) |
| Gemella haemolysans | 2 | 2 (100) | 1 (50) | ND (100) | ND (100) |
| Granulicatella adiacens | 1 | 1 (100) | 1 (100) | ND (100) | ND (100) |
| E. casseliflavus/E. gallinarum | 1 | 1 (100) | 1 (100) | ND (100) | ND (100) |
| Enterobacteriaceae | 35 | 34 (97.1) | 32 (91.4) | 33 (94.3) | — |
| E. coli | 23 | 22 (95.7) | 22 (95.7) | 23 (100) | — |
| K. pneumoniae | 5 | 5 (100) | 5 (100) | 3 (60) | — |
| E. cloacae | 3 | 3 (100) | 3 (100) | ND (100) | — |
| C. koseri | 1 | 1 (100) | 1 (100) | ND (100) | — |
| M. morganii | 1 | 1 (100) | 0 (0) | ND (100) | — |
| Raoultella sp. | 1 | 1 (100) | 0 (0) | ND (100) | — |
| S. marcescens | 1 | 1 (100) | 1 (100) | ND (100) | — |
| Non-Enterobacteriaceae | 11 | 6 (54.5) | 5 (45.5) | 11 (100) | — |
| P. aeruginosa | 2 | 2 (100) | 2 (100) | 2 (100) | — |
| A. baumannii complex | 1 | 1 (100) | 1 (100) | ND (100) | — |
| A. ursingii | 1 | 0 (0) | 0 (0) | ND (100) | — |
| B. cepacia complex | 1 | 1 (100) | 1 (100) | ND (100) | — |
| C. jejuni | 1 | 0 (0) | 0 (0) | ND (100) | — |
| C. indologenes | 1 | 0 (0) | 0 (0) | ND (100) | — |
| H. influenzae | 1 | 0 (0) | 0 (0) | ND (100) | — |
| H. parainfluenzae | 1 | 0 (0) | 0 (0) | ND (100) | — |
| P. stutzeri | 1 | 1 (100) | 0 (0) | ND (100) | — |
| S. maltophilia | 1 | 1 (100) | 1 (100) | ND (100) | — |
| Yeast | 5 | 3 (60) | 3 (60) | 5 (100) | — |
| C. parapsilosis | 2 | 1 (50) | 1 (50) | 2 (100) | — |
| C. kefyr | 1 | 1 (100) | 1 (100) | ND (100) | — |
| S. cerevisiae | 1 | 0 (0) | 0 (0) | ND (100) | — |
| C. neoformans | 1 | 1 (100) | 1 (100) | ND (100) | — |
| Total | 146 | 128 (87.7) | 117 (80.1) | 143 (97.9) | 93 (97.9) |
a
CoNS data include the following species: S. epidermidis (37 cultures), S. hominis (4 cultures), S. haemolyticus (2 cultures), S. pasteuri (1 culture), and S. simulans (1 culture).
b
ND, not detected; —, not done.