Abstract
Summary
Dogs kept on a diet deficient in tryptophan and nicotinic acid, developed typical pellagra, but their 5-HIAA urinary excretion did not differ from that of control dogs. The reasons for this discrepancy lie mainly i the typical course of canine pellagra which invariably results in early death due to intestinal or buccal infection (black tongue) before mental symptoms are likely to develop.
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