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Table 2 Differentiating peaks obtained by statistical analysis of 12 serovars belonging to the species L . interrogans

From: Leptospira species and serovars identified by MALDI-TOF mass spectrometry after database implementation

Serovars Peak mass (m/z) representing the protein size in Dalton
3,506 3,684 3,952 5,059 5,527 5,658 5,671 5,782 6,193 6,284 6,356 6,915 6,941 6,970 7,013 7,059 7,077 7,902 11,049 11,311
Autumnalis - + - - + - - - - - - - - - - - - - + -
Canicola § - § - - § - § + § - + + + + + + § - §
Icterohaemorrhagiae § + + + + § - + - - + - - § + § + + + +
Hardjo + - + + - - + + + + + + + + + + + § - §
Hebdomadis § + + + - - - § + - - - § § - + + § - -
Pomona + + + + - - - + + + + - § + + + + + - -
Saxkoebing - - § + - - - § - § § - § + + + + + + §
Batavie + + § + + + + - + - - + + + + + + § + +
Bratislava + + + + + + § + + + + § + + + + + + + +
Lora - - + § - - + + § + + - - - - § § + - -
Copenhageni - + + § + - - - + + - - - - - - § § + -
Zanoni - + - - + + + - - - - + + - - - - - § +
  1. The identification of each serovar is derived from the combinations of the 20 discriminating considered peaks.
  2. +: peak with area/intensity of the Serovar Average Spectrum higher than the Total Average Spectrum for the respective considered peak.
  3. -: no peak found.
  4. §: peak with area/intensity of the Serovar Average Spectrum lower than the Total Average Spectrum for the respective considered peak.