(a) Low power magnification image of chronically inflamed stomach with hyperplasia of surface and glandular epithelium. H&E stain; bar = 142 μm. (b) High power magnification image of hyperplastic gastric glandular and surface epithelium with protozoa (arrows) closely associated with the apical surface membranes of the epithelial cells. Other protozoa are free in the lumen. H&E, bar = 14 μm.