TABLE 2.

Statistics of strain discrimination by mass and intensity decision boundaries.

Total number of peaks within boundaries (in parenthesis), their mean m/z and standard deviation are shown for field isolates and Rev.1 vaccine strains [format: ± σ (n)]. Gray fields highlight biomarkers with 100% peak absence/presence and the discriminatory power of spectra in the respective institute. For some samples, we observed more than one peak in the m/z window. Ribosomal Protein L24: PLF_234_00001168; Ribosomal Protein S12: PLF_234_00002366. (PLfam, PATRIC genus-specific families; mass window unit: m/z in Dalton).