Abstract
A naturally-occurring arterial disease which is anatomically similar to early human atherosclerosis is apparently widely distributed in many species, and its presence has been reported in 1 prosimian and in Ceboidea, Cerco-pithecidae, and Pongidae. Only in a few instances have the lesions been so advanced as to lead to occlusions and complications which could have accounted for the death of the animals. The influence of several factors such as age, sex. and blood lipids in connection with the naturally-occurring disease has been reviewed. Reports on experimentally-induced arterial lesions have been described.