Gastric amebiasis occurred naturally in two wallaroos in the Baton Rouge Zoo. Infection by an Entamoeba sp. parasite was confined to the forestomach and was characterized by hemorrhage and necrosis of the mucosa; parasitic invasion of the lamina propria, submucosa, and muscularis; and extensive gastric edema. Typical amebic cysts were found in the feces of the animal that died and of those in contact. Gastric amebiasis has not previously been reported in marsupials.
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