LARGE-SPORED RINGWORM 



535 



France Trichophyton acuminatum is the more common, whereas 

 in Scotland Trichophyton crateriforme (variety flavum) (Fig. 

 164a) is the most frequent cause of large-spored ringworm of 

 the scalp, and Trichophyton rosaceum (Fig. 1646) of ringworm 



FIG. 164. a, Tricophytou crateriforme. b, Trichophyton 

 rosaceum. Sabouraud's medium. 



of the beard. In France another coloured variety Tricho- 

 phyton violaceum is of common occurrence. Similar organisms 

 have been described in the lower animals, such as the horse, 

 calf, and dog, and the infection of man from such sources is 

 relatively^frequent. 



