Nutritional and environmental factors affecting pigmentation inTrichophyton rubrum |
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| Authors: | R A Zussman E E Vicher I Lyon |
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| Institution: | (1) Depts. of Microbiol. and Biol., Chem. Univ. of Illinois Coll. of Med., Chicago, Ill. |
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| Abstract: | Summary 1. Pigmentation inTrichophyton rubrum appears to be dependent upon tyrosine and phenylalanine (as precursors), carbohydrate (primarily as an energy source), and oxygen.2. Cysteine and methionine inhibit the growth ofT. rubrum in a minimal medium. L-sorbose also inhibits the growth of this organism, even in a complete medium.3.T. rubrum apparently synthesizes all of the vitamins required for growth and pigmentation.4. At certain concentrations of ascorbic acid, it is possible to distinguish between the pigmentogenic and growth processes ofT. rubrum.5. Sunlight suppresses growth and pigmentation inT. rubrum. |
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