Hydatid disease in four nonhuman primates.

Hydatid disease was detected in 4 nonhuman primates (Galago crassicaudatus, Lemur catta, and 2 Macaca mulatta) at the Oregon Regional Primate Research Center. Involvement extended from 2 1/2 to 7 1/2 years. A 6-cm cyst was surgically removed from the thoracic cavity of 1 macaque; 6 years later multiple cysts were found in its abdominal cavity. Lesions found in the primates at necropsy included compression or displacement of the lungs, hydroureter and hydronephrosis, and distension of the abdomen--all related to impingement of developing cysts.