Relative gene expression at 6 h and 24 h p.i. in microdissected samples. RNA was obtained from porcine cells in the infection loci (LCM) and manually dissected lung material (MAN). Note y-axis in log-scale. Error bars depict SEM. * indicate high correlation between LCM and MAN samples (Pearson’s r > 0.72, P < 0.05).