FIGURE 4.

Effect of Wooden Breast (WB) on macrophage density (per mm²) and collagen infiltration into the pectoralis major (PM) muscle of broilers reared to 43 days of age (n = 8 per score per d). (A) Show representative cryohistological immunofluorescence staining images from normal (WB score 0) and severely WB-affected (WB score 2) PM muscles of broilers at 43 days of age for macrophages (red), (B,C) illustrate the location of the macrophages (red) in relation to the collagen (green) co-immunostaining located largely between myofibers. Scale bar = 100 μm.