Section 71
Chapter 70,334

A partially thiamin deficient strain of Trichophyton tonsurans

Gugnani, H.C.; Mohapatra, L.N.

Mycopathologia 28(1-2): 161-164


ISSN/ISBN: 0301-486X
DOI: 10.1007/bf02276047
Accession: 070333869

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An isolate from a case of tinea corporis showed only submerged growth of irregularly branched hyphae and chlamydpspores on Sabouraud's dextrose agar without vitamins, on casein agar without thiamin or inositol, and casein agar with inositol alone. The addition of thiamin to these media allowed the growth of discrete, slowly developing, flat colonies which later became velvety, folded, and tan yellow on the surface. Microconidia remained partly unstained in lactophenol blue. Macroconidia were few, with thin smooth walls, clavate, 14-30 x 1.7-2.4 mu . Slight scaly dermatitis developed on 2 guineapigs 7 days after a suspension of mycelium and spores had been applied to abrased skin.

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