Figure 2

Numbers of differentially expressed genes in temporal comparison of Medicated and Non-medicated groups of chickens. (A) Comparison of post- and pre-challenges. Number of differentially expressed genes between pre – and post-challenge time points. (B) Comparison of post-challenge on different days. Number of genes unique to Medicated (hatched bars), unique to Non-medicated (open bars) treatment groups and number of genes in common for both Medicated and Non-medicated groups (black bars) are represented. Expression data were determined by mixed model analysis of mean signal intensity minus median background intensity measured from Agilent 44 K chicken microarray (p < 0.001). Medicated and Non-medicated groups of chickens represent the birds on diets containing bacitracin (55 ppm) or no antibiotics.