Abstract
Summary
1. Serum, bile, and liver total cholesterol levels of 9 species of laboratory animals and 4 species of amphibians are reported. 2. Dogs, monkeys, hamsters, and mice have relatively higher serum total cholesterol concentration than cats, rats, rabbits, and guinea pigs. 3. Total cholesterol concentration in liver varies only slightly among these species. 4. Gall-bladder bile of monkeys contains large amounts of total cholesterol. Guinea pigs excrete very small amounts of total cholesterol in bile. 5. Serum and liver total cholesterol concentrations of the pigeon are very high. 6. Total cholesterol concentration in liver varies slightly among the 4 species of amphibians used. Frogs excrete significant amounts of cholesterol in bile. 7. Serum total cholesterol concentrations of both species of toads are higher than those of both species of frogs.
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