Abstract
Conclusions
When crystalline borrelidin is given orally to rats at a level of 10 μg per day, poor growth results. This inhibition of growth can be partially overcome by supplementation with niacin. Two μg of borrelidin per day given orally is without effect upon the growth of rats whereas 20 μg per day results in a high mortality rate. Poor growth is also observed in rats receiving a basal ration containing levels of 1 and 2 mg borrelidin per kilo. The addition of niacin or tryptophan results in significantly better growth.
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