TABLE 2.
Identification of gram-negative bacteria by fluorimetric and colorimetric VITEK 2 cards
| Family and species or subspecies | No. (%) of strains
|
||||||||
|---|---|---|---|---|---|---|---|---|---|
| Tested | Identified as first choice
|
Identified with low discrimination
|
Misidentified
|
Not identified
|
|||||
| ID-GPC | GP | ID-GPC | GP | ID-GPC | GP | ID-GPC | GP | ||
| Fermenting | |||||||||
| Aeromonas hydrophila/Aeromonas caviae | 5 | 3 | 5 | 2 | 0 | 0 | 0 | 0 | 0 |
| Citrobacter amalonaticus | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
| Citrobacter braakii | 2 | 0 | 2 | 2 | 0 | 0 | 0 | 0 | 0 |
| Citrobacter freundii | 6 | 6 | 6 | 0 | 0 | 0 | 0 | 0 | 0 |
| Citrobacter koseri | 11 | 11 | 11 | 0 | 0 | 0 | 0 | 0 | 0 |
| Citrobacter youngae | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
| Enterobacter aerogenes | 18 | 17 | 17 | 1 | 0 | 0 | 0 | 0 | 1 |
| Enterobacter amnigenus | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
| Enterobacter asburiae | 2 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
| Enterobacter cloacae | 15 | 10 | 14 | 4 | 0 | 1 | 1 | 0 | 0 |
| Enterobacter gergoviae | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
| Enterobacter sakazakii | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
| Escherchia coli | 26 | 24 | 25 | 1 | 1 | 1 | 0 | 0 | 0 |
| Escherichia hermannii | 2 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
| Escherichia vulneris | 1 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 0 |
| Hafnia alvei | 7 | 7 | 7 | 0 | 0 | 0 | 0 | 0 | 0 |
| Klebsiella oxytoca | 11 | 11 | 10 | 0 | 1 | 0 | 0 | 0 | 0 |
| Klebsiella pneumoniae subsp. pneumoniae | 12 | 10 | 11 | 2 | 1 | 0 | 0 | 0 | 0 |
| Klebsiella pneumoniae subsp. ozaenae | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
| Klebsiella spp. | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
| Leclercia adecarboxylata | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
| Moellerella wisconsensis | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
| Morganella morganii | 11 | 11 | 11 | 0 | 0 | 0 | 0 | 0 | 0 |
| Pantoea agglomerans | 3 | 3 | 3 | 0 | 0 | 0 | 0 | 1 | 0 |
| Pantoea spp. | 2 | 0 | 2 | 1 | 0 | 0 | 0 | 0 | 0 |
| Pasteurella aerogenes | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
| Pasteurella multocida | 6 | 4 | 6 | 1 | 0 | 1 | 0 | 0 | 0 |
| Pasteurella pneumotropica | 2 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
| Proteus mirabilis | 17 | 17 | 17 | 0 | 0 | 0 | 0 | 0 | 0 |
| Proteus vulgaris group/Proteus penneri | 7 | 7 | 7 | 0 | 0 | 0 | 0 | 0 | 0 |
| Providencia rettgeri | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
| Providencia stuartii | 11 | 11 | 11 | 0 | 0 | 0 | 0 | 0 | 0 |
| Rahnella aquatilis | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
| Salmonella group | 12 | 9 | 12 | 3 | 0 | 0 | 0 | 0 | 0 |
| Serratia liquefaciens group | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
| Serratia marcescens | 15 | 15 | 15 | 0 | 0 | 0 | 0 | 0 | 0 |
| Serratia proteamaculans | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
| Shigella group | 3 | 1 | 3 | 2 | 0 | 0 | 0 | 0 | 0 |
| Shigella sonnei | 5 | 5 | 5 | 0 | 0 | 0 | 0 | 0 | 0 |
| Vibrio alginolyticus | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
| Yersinia enterocolitica group | 13 | 11 | 13 | 1 | 0 | 0 | 0 | 1 | 0 |
| Yersinia pseudotuberculosis | 3 | 2 | 2 | 0 | 0 | 0 | 0 | 1 | 1 |
| Total | 243 | 213 (87.7) | 237 (97.5) | 23 (9.5) | 3 (1.2) | 4 (1.6) | 1 (0.4) | 3 (1.2) | 2 (0.8) |
| Nonfermenting | |||||||||
| Achromobacter xylosoxidans subsp. denitrificans | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 0 |
| Achromobacter xylosoxidans subsp. xylosoxidans | 7 | 0 | 6 | 0 | 1 | 5 | 0 | 2 | 0 |
| Acinetobacter baumannii | 8 | 6 | 8 | 2 | 0 | 0 | 0 | 0 | 0 |
| Acinetobacter haemolyticus | 4 | 0 | 4 | 0 | 0 | 3 | 0 | 1 | 0 |
| Acinetobacter lwoffii | 2 | 0 | 2 | 2 | 0 | 0 | 0 | 0 | 0 |
| Acinetobacter spp. | 5 | 0 | 1 | 2 | 1 | 0 | 3 | 3 | 0 |
| Bordetella bronchiseptica | 4 | 0 | 3 | 3 | 0 | 0 | 1 | 1 | 0 |
| Bordetella trematum | 1 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 |
| Burkholderia cepacia | 8 | 7 | 8 | 1 | 0 | 0 | 0 | 0 | 0 |
| Chryseobacterium indologenes | 2 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
| Chryseobacterium meningosepticum | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
| Comamonas testosteroni | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 |
| Delftia acidovorans | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
| Moraxella osloensis | 1 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 |
| Ochrobactrum anthropi | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
| Oligella ureolytica | 2 | 0 | 2 | 0 | 0 | 0 | 0 | 2 | 0 |
| Pseudomonas aeruginosa | 13 | 12 | 13 | 0 | 0 | 0 | 0 | 1 | 0 |
| Pseudomonas alcaligenes | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 |
| Pseudomonas fluorescens | 3 | 0 | 1 | 2 | 1 | 1 | 0 | 0 | 1 |
| Pseudomonas mendocina | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 |
| Pseudomonas putida | 3 | 0 | 2 | 2 | 0 | 1 | 1 | 0 | 0 |
| Pseudomonas stutzeri | 6 | 0 | 6 | 3 | 0 | 1 | 0 | 2 | 0 |
| Ralstonia mannitolilytica | 1 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 0 |
| Rhizobium radiobacter | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
| Sphingomonas paucimobilis | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
| Stenotrophomonas maltophilia | 9 | 8 | 8 | 1 | 1 | 0 | 0 | 0 | 0 |
| Total | 88 | 38 (43.2) | 74 (84.1) | 21 (23.8) | 7 (8.0) | 13 (14.8) | 6 (6.8) | 16 (18.2) | 1 (1.1) |
| All strains (%) | 331 | 251 (75.8) | 311 (94) | 44 (13.3) | 10 (3) | 17 (5.1) | 7 (2.1) | 19 (5.7) | 3 (0.9) |