Table 4.
CCI analysis results showing the differences between the degree of similarity within the strain (intrastrain) to that noted between the strains (interstrain) of the MS spectra of the tested S. aureus strains depending on the medium and matrix used presented as a result of their subtraction (∆). An increase in the color intensity in the column means a higher value for the parameter.
| Difference Between the Intrastrain and Interstrain Degree of Similarity (∆) | ||||
|---|---|---|---|---|
| Medium | HCCA Matrix | DHB Matrix | SDHB Matrix | Mean |
| MHA | 0.12 | 0.16 | 0.07 | 0.12 |
| TSA | 0.06 | 0.10 | 0.05 | 0.07 |
| COL | 0.12 | 0.15 | 0.14 | 0.14 |
| BHI | 0.12 | 0.19 | 0.09 | 0.13 |
| BLA | 0.26 | 0.17 | 0.20 | 0.21 |
| CHRA | 0.15 | 0.15 | 0.25 | 0.18 |
| VRE | 0.18 | 0.13 | 0.18 | 0.16 |
| MAN | 0.10 | 0.06 | 0.11 | 0.09 |
TSA-Tryptic Soy Agar, MHA-Mueller Hinton Agar, COL-Columbia Agar Base, BHI-Brain Heart Infusion Agar, BLA-Columbia Blood Agar, CHRA-CHROMagarTM Orientation, MAN-Mannitol Salt Agar, VRE-Vancomycin Resistant Enterococci Agar Base, HCCA-α-Cyano-4-hydroxycinnamic acid, DHB-2,5-dihydroxybenzoic acid, SDHB-mixture of DHB and 2-hydroxy-5-methoxybenzoic acid (9:1 w/w).