Figure 6.

Necrotic enteritis lesions. (A) Score 1: intestine is thin and friable; (B) Score 2: the picture shows the thin, friable intestine with a small patch of necrosis (yellow circle). There is also redness in the intestinal tract, and some gray mucus is characteristic; (C) Score 3: the intestine shows a larger lesion visible through the outer wall of the intestinal tract. There are larger patches of necrosis (white circle and arrow), which are the green areas stained by bile. Panel C.1 shows the closed tube and panel C.2 shows the open tube and exposed inner side above.