Figure 4  .

Rectal biopsies from patients with ulcerative colitis treated with the active diet. The sections were incubated with an antiserum against antisecretory factor (AF). Bars=100 µm. (A) Patient No 31 before the diet period. (B) Patient No 31 after the diet period. There appears to be more AF positive cells (arrows) in the lamina propria after the diet period. (C) Larger magnification of (B), showing AF positive cells (arrows) in the lamina propria. (D) Patient No 12 before the diet period. There are signs of an acute inflammatory reaction. Many small inflammatory cells show moderate AF immunoreactivity. (E) The same patient after the diet period. In this biopsy there is no acute inflammation. Large AF positive cells (arrows) are evenly distributed within the entire lamina propria.