STUDIES ON THE GROWTH OF HISTOPLASMA CAPSULATUM III. Histoplasma capsulatum

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Abstract
The vitamin requirements of the mycelial and yeast phases of several strains of H. capsulatum are compared. Although no single vitamin was found to be required by the mycelial phase at 25[degree]C, 8 of 11 yeast phase strains required thiamine for their maximum rate of growth at 37[degree]C. Growth rates of mycelial and yeast phases at 25[degree]C were equal to or greater than those of the yeast phase at 37[degree]C. Although conversion of yeast to mycelium was readily accomplished at 25[degree]C, this transformation rarely occurred at 37[degree]C.