Expression of selected genes after exposure of CCH to 5-fluorouracil or M. synoviae WVU 1853. Exposure agent and time of exposure (in hours) are indicated below columns. Control (CTRL) represents in all graphs non-exposed CCH. The results are given as mean values ± standard error for three independent cell treatment experiments with three RT-qPCR replicates for each experiment. Means marked with stars are significantly different from controls (p < 0.05 to p < 0.001) by Student t-test.