Gene expression in submandibular and tracheobronchial lymph nodes after S. suis intranasal inoculation. Samples from the submandibular (A) and tracheobronchial (B) lymph nodes were collected at 1 and 3 days after the intranasal inoculation of S. suis T15 (non-virulent) and S10 (virulent). Results at 1 day post-inoculation from piglets inoculated with PBS are also included as control. All the genes found to be quantifiable are shown irrespectively of their statistical significance. Gene expression was normalized relative to the PBS group and log2 transformed. Values are presented as a heat map. Numbers in abscissa axis represent animal ID. Color scale was limited to ± 4 and out of bounds values displayed with the maximum intensity color. Gene functional groups: A.P.P.: Acute Phase Proteins; Ad. M.: Adhesion Molecules; Misc.: Miscellaneous; P.R.R.: Pattern Recognition Receptors.