Systemic pathology of chimpanzees.

Spontaneous lesions in chimpanzees have been described according to the organ system involved. These lesions have been reported in the literature or noted in chimpanzees at the 6571st Aeromedical Research Laboratory (ARL), Holloman AFB, N. Mex., over a 15-year period. some of the lesions seen at the ARL were the result of overt clinical disease, while others represent incidental findings, the significance and genesis of which were often obscure. Conditions involving the gastrointestinal tract, especially parasitic diseases, have been and continue to be of the highest frequency, with disorders involving the cardiovascular system next. Infectious diseases have been infrequent, especially in the stabilized colony, and neoplastic conditions have not been seen.