ID#: 16588
Caption:
These three slant culture tubes were used in a Trichophyton concentricum nutritional requirements test. From left to right, Tube 1 contained growth medium plus only casein, Tube 2 contained growth medium plus casein and thiamine, and Tube 3 contained growth medium plus casein and thiazole. Tube 1 produced no appreciable growth, while both tubes 2 and 3, produced 4+ maximal T. concentricum colonial growth. Based on the results of this particular test, this strain of T. concentricum was dependent on the thiazole portion of the thiamine molecule, based on the enhanced growth in tubes 2, which contained thiamine, and 3, which contained thiazole.
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Content Provider(s): CDC/ Dr. Lucille K. Georg
Creation Date: 1969
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