TABLE 5.
Comparison of levels of accuracy of identification between ID-GNB and GNI+ cardsa
| Reference identification | Total no. of isolates tested | No. of isolates with the indicated identification with the following cardb:
|
|||||
|---|---|---|---|---|---|---|---|
| ID-GNB
|
GNI+
|
||||||
| Correctly identified | Unidentified | Error | Correctly identified | Unidentified | Error | ||
| Cedecea davisae | 6 | 5 | 1 | 6 | |||
| Cedecea lapagei | 4 | 4 | 3 | 1 | |||
| Citrobacter amalonaticus | 10 | 7 | 1 | 10 | |||
| Citrobacter braakii | 5 | 5 | 3 | 1 | |||
| Citrobacter farmeri | 5 | 3 | 4 | 1 | |||
| Citrobacter koseri | 10 | 9 | 1 | 9 | 1 | ||
| Citrobacter youngae | 4 | 3 | 2 | 2 | |||
| Edwardsiella tarda | 10 | 7 | 1 | 8 | 1 | 1 | |
| Enterobacter aerogenes | 10 | 9 | 1 | 10 | |||
| Enterobacter asburiae | 10 | 9 | 1 | 8 | 2 | ||
| Enterobacter cancerogenus | 10 | 7 | 1 | 1 | 10 | ||
| Enterobacter cloacae | 10 | 6 | 1 | 9 | |||
| Enterobacter gergoviae | 10 | 10 | 9 | 1 | |||
| Enterobacter sakazakii | 10 | 10 | 10 | ||||
| Escherichia coli | 30 | 24 | 3 | 1 | 27 | 2 | |
| Escherichia fergusonii | 10 | 10 | 8 | 1 | |||
| Escherichia hermannii | 10 | 9 | 1 | 9 | 1 | ||
| Escherichia vulneris | 10 | 8 | 1 | 7 | 2 | 1 | |
| Ewingella americana | 10 | 9 | 10 | ||||
| Hafnia alvei | 9 | 9 | 7 | 1 | 1 | ||
| Klebsiella ornithinolytica | 10 | 10 | 10 | ||||
| Klebsiella oxytoca | 10 | 7 | 10 | ||||
| Klebsiella pneumoniae subsp. ozaenae | 10 | 9 | 1 | 10 | |||
| Klebsiella pneumoniae subsp. pneumoniae | 10 | 8 | 10 | ||||
| Klebsiella pneumoniae subsp. rhinoscleromatis | 10 | 9 | 10 | ||||
| Kluyvera ascorbata-K. cryocrescens | 10 | 8 | 1 | 2 | 1 | 2 | |
| Leclercia adecarboxylata | 8 | 8 | 7 | 1 | |||
| Moellerella wisconsensis | 8 | 8 | 7 | 1 | |||
| Morganella morganii | 10 | 9 | 10 | ||||
| Pantoea agglomerans | 7 | 6 | 1 | 5 | 2 | ||
| Proteus mirabilis | 10 | 8 | 10 | ||||
| Proteus penneri | 8 | 6 | 1 | 7 | 1 | ||
| Proteus vulgaris | 9 | 9 | 9 | ||||
| Providencia alcalifaciens | 7 | 7 | 6 | 1 | |||
| Providencia rettgeri | 8 | 8 | 7 | 1 | |||
| Providencia rustigianii | 2 | 2 | 2 | ||||
| Providencia stuartii | 14 | 14 | 14 | ||||
| Rahnella aquatilis | 2 | 2 | 2 | ||||
| Salmonella enterica subsp. arizonae | 7 | 6 | 1 | 5 | 2 | ||
| Salmonella group | 0 | 0 | 0 | ||||
| Salmonella enterica serotype Cholerae-suis | 2 | 2 | 1 | 1 | |||
| Salmonella serotype Paratyphi A | 2 | 1 | 2 | ||||
| Salmonella enterica serotype Typhi | 2 | 2 | 2 | ||||
| Salmonella enterica serotype Typhimurium | 1 | 1 | 1 | ||||
| Serratia fonticola | 10 | 7 | 3 | 8 | 1 | 2 | |
| Serratia liquefaciens group | 10 | 8 | 1 | 9 | 1 | ||
| Serratia marcescens | 10 | 10 | 9 | 1 | |||
| Serratia odorifera | 10 | 10 | 10 | ||||
| Serratia plymuthica | 10 | 7 | 9 | 1 | |||
| Serratia rubidaea | 10 | 9 | 10 | ||||
| Shigella group (three species) | 6 | 4 | 1 | 1 | 5 | 1 | |
| Shigella sonnei | 4 | 3 | 1 | 4 | |||
| Yersinia enterocolitica group (four species) | 18 | 18 | 16 | 1 | 1 | ||
| Yersinia pseudotuberculosis | 6 | 3 | 1 | 1 | 5 | 1 | |
| Total | 454 | 392 | 18 | 11 | 403 | 22 | 21 |
a
Numbers in the correctly identified, unidentified, and error columns may not add to the total number. Identifications at the low level of accuracy were not included.
b
A total of 410 (90.3%) strains were correctly identified with the ID-GNB card (error rate, 2.4%), whereas a total of 425 (93.6%) strains were correctly identified with the GNI card (error rate, 4.6%).