|This is a histologic section of liver from a tortoise with amoebiasis.
large blue cells in the sinusoids are the amoebae. The condition is
Entamoeba invadens. Tortoises were initially thought to be carriers of
organisms, but they also can develop clinical (and usually fatal)
The infection starts in the intestine or colon, often in conjunction
bacterial infection or other parasites. From there, amoebae enter the
stream and migrate to other viscera, especially liver and lung. Photo
courtesy Northwest ZooPath.|