. Pathogenic microörganisms; a practical manual for students, physicians, and health officers . n;the prognosis as regards treatment is good. One-third of the cases ofT. tonsurans of children are due to megalospora. The spores of are contained in a mycelium; but this is not visible, thespores appearing irregularly piled up like zooglea masses; and, growingoutside, they form a dense sheath around the hair. The spores of are always contained in distinct mycelium filaments, whichmay either be resistant when the hair is broken up or fragile and easilybreaking up into
. Pathogenic microörganisms; a practical manual for students, physicians, and health officers . n;the prognosis as regards treatment is good. One-third of the cases ofT. tonsurans of children are due to megalospora. The spores of are contained in a mycelium; but this is not visible, thespores appearing irregularly piled up like zooglea masses; and, growingoutside, they form a dense sheath around the hair. The spores of are always contained in distinct mycelium filaments, whichmay either be resistant when the hair is broken up or fragile and easilybreaking up into spores. The two types show distinct and constantcharacters when grown in artificial cultures. The cultures of T. micro-sporon show a downy surface and white color; those of T. megalosporona powdery surface, with arborescent peripheral rays, and often a yellow- 236 THE PATHOGENIC MOLDS ish color. Although the morphological appearances, mode of growth,and chnical effects of each type of trichophyton show certain charactersin general, yet there are certain constant minor differences which point. Fig. 92.—-Hair riddled with ringworm fungus. Megalosporon variety.
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