ENTAMOEBA-HISTOLYTICA INFECTION IN HANUMAN (SEMNOPITHECUS-ENTELLUS) AND PURPLE-FACED (TRACHYPITHECUS-VETULUS) LANGURS

From 26 June 1991 to 25 September 1991, three Hanuman langurs (Semnopi thecus entellus) and two purple-faced langurs (Trachypithecus vetulus) housed at the Greater Baton Rouge Zoo exhibited clinical signs of ata xia, weakness, and anorexia. Two Hanuman langurs were euthanized; one Hanuman langur and one purple-faced langur died; and one purple-faced langur that was treated with metronidazole i.v. survived. Gastric ulce ration was present in one case and duodenal ulceration was present in another. Liver lesions were similar in all cases and consisted of mult ifocal coagulative to caseous necrosis in the liver with infiltrates o f lymphocytes and plasma cells in the necrotic lesions. Entamoeba hist olytica trophozoites were confirmed in the liver lesions of one purple -faced and two of the Hanuman langurs.