Figure 1. This photo-micrograph shows Entamoeba histolytica trophozoites in a colonic ulcer containing ingested red blood cells; the organisms are surrounded by eosinophilic debris as a result of submucosal destruction. (Figures 1 and 2 from the collection of the late Dr Harrison Juniper, from Barnes PF et al. Medicine (Baltimore). 1987.^[26] Copyright © 1999 by the Infectious Diseases Society of America.)

Figure 2. Colonic ulcers from a patient with amebiasis; the ulcers measure about 1 mm in diameter (A). Cross-sectional view of a colonic ulcer showing the "flask" shape (B).

Figure 3. Entamoeba histolytica or Entamoeba dispar in stool preparations. Trichrome stain of the trophozoite (A). Iodine stain of the cyst (B). The 2 species are morphologically indistinguishable.

Figure 4. CT image of hepatic amebic abscesses.