TABLE 1.
Comparison of identification systems
| Assay | % Assignment at taxonomic level
|
% Correct identification at taxonomic level
|
% Incorrect assignment at taxonomic level
|
|||||
|---|---|---|---|---|---|---|---|---|
| Species | Genus | No identification | Species | Genus | Species | Genus | No identification | |
| 16S rRNA gene sequencing | 90 (n = 81) | 10 (n = 9) | ||||||
| API 20 NE | 56 (n = 50) | 5 (n = 5) | 39 (n = 35a) | 45.5 (n = 41) | 10 (n = 9) | 6.5 (n = 6) | 38 (n = 34) | |
| VITEK 2 fluorescent card | 56 (n = 50) | 44 (n = 40b) | 48 (n = 43) | 2 (n = 2) | 5.5 (n = 5) | 44.5 (n = 40) | ||
| VITEK 2 colorimetric card | 87 (n = 78) | 3 (n = 3) | 10 (n = 9c) | 59 (n = 53) | 10 (n = 9) | 20 (n = 18) | 1 (n = 1) | 10 (n = 9) |
a
Of the 35 isolates not identified, 11 belong to a species not included in the API 20 NE database.
b
Of the 40 isolates not identified, 31 belong to a species not included in the VITEK 2 identification database.
c
Of the 9 isolates not identified, 3 belong to a species not included in the VITEK 2 identification database.