620 APPENDIX. 



TRICHOPHYTON (Ringworm Fungus). 



Kingworm of the body or hairless parts of the skin, 

 tinea circinata, and ringworm of the hairy parts, tinea 

 tonxurans and tinea barbce or tinea sycosis are due to 

 the fungus trichophyton, discovered by Gruby in the 

 human hair, and between the epidermal cells by Hebra, 

 and obtained in free cultures by gravity. 



FIG. 83. 



Hair riddled with ringworm fungus. Megalosporon variety. 



According to Sabouraud, whose conclusions are based 

 on an extensive series of microscopical examinations of 

 cases of tinea in man and animals, of cultivation in 

 artificial media, and of inoculation on man and animals, 

 there are two distinct types of the fungus trichophyton 

 causing ringworm in man one with small spores (2 to 

 3 mm.), which he calls "T. microsporon," and one 

 with large spores (7 to 8 mm.), which he calls "T. 

 megalosporon." They differ in their mode of growth 

 on artificial media and in their pathological effects on 



