Serum lipids and lipoproteins were surveyed during quarantine of a group of 811 wild-caught rhesus monkeys. No abnormalities indicative of dyslipoproteinemia analogous to the familial hyperlipoproteinemias in man were observed. Males had significantly lower mean cholesterol (134 mg/dl) and higher mean triglyceride (41.9 mg/dl) concentrations than females (155 and 37.5 mg/dl, respectively). Electrophoretic distribution of lipoproteins differed with sex. Cholesterol concentration and electrophoretic pattern had not attained steady state by ten weeks either in animals recently imported or in those conditioned in another laboratory for six months or more after import.
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