Table 3.
Comparison among phenotypic manual methods and VITEK 2, MALDI-MS, Phoenix and MALDI-BD, according to identification level of 22 samples of bacteria (Chryseobacterium indologenes and Elizabethkingia meningoseptica)
| Identification level | Manual + VITEK 2 | Manual + MALDI-MS |
Manual + MALDI-BD |
VITEK 2 + MALDI-MS |
VITEK 2 + MALDI-BD |
MALDI-MS + MALDI-BD | Manual + Phoenix |
VITEK 2 + Phoenix |
Phoenix + MALDI-MS |
Phoenix + MALDI-BD |
|---|---|---|---|---|---|---|---|---|---|---|
| Genus/species | 14 | 6 | 7 | 7 | 7 | 6 | 11 | 13 | 7 | 9 |
| Genus | 3 | 4 | 3 | 7 | 9 | 1 | 1 | 4 | 6 | |
| Discrepancy | 4 | 5 | 7 | 6 | 8 | 1 | 5 | 7 | 4 | 6 |
| Inconclusive | 4 | 8 | 4 | 6 | 6 | 5 | 1 | 7 | 1 | |
| Total | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 |
Data are shown as number of samples.
MALDI-BD, MALDI-TOF BioTyper (Becton Dickinson (BD), San Diego, CA, USA); MALDI-MS, MALDI-TOF VITEK MS (bioMérieux, Marcy l’Étoile, France); MALDI-TOF, matrix-assisted laser desorption/ionization time-of-flight mass spectrometry; Phoenix (BD); VITEK 2, VITEK 2 automated phenotypic method (bioMérieux).