AN UNUSUAL VARIANT OF TRICHOPHYTON TONSURANS VAR SULFUREUM

A fungus, recovered from a skin lesion of a patient, produced velvety to powdery, white to deep yellow colonies on Sabouraud glucose agar. M icroscopically, it produced a large number of cylindric, smooth-walled , three- to eight-celled macroconidia but failed to produce microconid ia on a variety of nutritional media such as rice grains, cornmeal dex trose, potato dextrose, Sabouraud glucose, oatmeal and lactrimel agars . It hydrolysed urea in 7 days, perforated hair in vitro and required thiamine for growth. This isolate represents an atypical variant of Tr ichophyton tonsurans var. sufureum subvar. perforans.