Table 2. Concordance between conventional and direct and extracted MALDI-TOF-MS methods for Gram-negative isolates of three genera.
Genera | Total | Conventional | D-MALDI-TOF | E-MALDI-TOF | AE increase(%) |
E.coli | 1 | 1 | 1 | 1 | n/a |
Proteus | 5 | 5 | 1 | 4 | 80 |
Acinetobacter | 7 | 7 | 1 | 6 | 85.7 |
D-MALDI-TOF (direct method); E-MALDI-TOF (extracted method); AE increase (increase of identification after alcoholic extraction).