lOOO 



ASCOMYCETES AND BASIDIOMYCETES 



Trichophyton soudanense C. Joyeux, 1912. 



Endothrix ; very similar to T. tonsurans. In the hairs the mycehal 

 spores are generally rectangular, arranged in long strings. On 

 Sabouraud's agar the growth appears three to four days after in- 

 oculation as a small yellow nodule; later, the peripheral portion 

 of the growth appears white. It has been found by C. Joyeux in 

 cases of tinea capitis in the Sudan. 



Trichophyton violaceum Bodin, 1902. 



Discovered by Sabouraud in cases of tinea barbae; type Endo- 

 thrix. The growth on maltose agar is of a light brownish or greyish 

 colour, with moist surface, and later becomes violet. 



This species is common in Italy and North Africa. In Ceylon 

 a variety of this fungus produces a type of very common ring- 

 worm of the scalp in children, with white patches covered by 

 enormous numbers of pityriasic squamse. The patches often remain 

 permanently bald. The Ceylon fungus is endo-ectothrix, and 

 although culturally is hardly distinguishable from T. violaceum, 

 is probably a different variety (var. decalvans Castellani, 1913), as 

 it produces lesions generally different from those induced by 

 T. violaceum. In the Sudan it apparently liquefies gelatine more 

 rapidly (var. kJiartoumense Chalmers and Macdonald, 1915). 



Trichophyton glabrum Sabouraud, 1909. 



Closely allied to T. violaceum, but shows a more rapid growth, and 

 no violet pigmentation develops. Surface smooth and moist. 



Trichophyton sulphureum C. Fox, 1908. 



Described by Colcott Fox in some cases of tinea capitis in Eng- 

 land. Endothrix type. On Sabouraud's agar the growth is 

 characterized by a central reddish nodule, which later becomes 

 crateriform, assuming a speckled appearance. The rest of the 

 culture has a delicate but distinct primrose or sulphur colour. 



Trichophyton plicatile Sabouraud, 1909. 

 Colonies closely resemble those of T. tonsurans, but have a creased 

 appearance. Found by Sabouraud in cases of sycosis. Sequeira 

 has observed it in a case of trichophytic granuloma. We have placed 

 the fungus in the genus Neotrichophyton (p. 100 1). 



Trichophyton circonvolutum Sabouraud, 1909. 



Endothrix ; somewhat similar to T. plicatile ; the growth has a 

 convoluted surface. Found by Sabouraud in cases of trichophytosis 

 contracted in the. Sudan and Dahomy. 



Trichophyton exsiccatum Uriburu, 1909. 

 Found in Argentina by Uriburu. Endothrix; very slow growth; 

 crateriform colonies, with surface finely cracked, and of a dry aspect. 



