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. 2013 Jan 17;8(1):e54223. doi: 10.1371/journal.pone.0054223

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).