FIG. 3.

Histopathology induced by toxin preparations. After the 6-h fluid accumulation experiments, rabbit ileal loops selected for histologic examination were formalin fixed and embedded in paraffin. Hematoxylin and eosin was used to stain 4-μm-thick sections of intestinal tissue treated with the indicated construct. In each panel, L represents the intestinal lumen, while LP identifies the lamina propria. The preparation used to treat each loop is noted at the bottom of each panel. Final magnification of each photomicrograph, ×400.