I002 



ASCOMYCETES AND BASIDIOMYCETES 



Type Species. — Neofrichophyton flavum Bodin, 1902. 

 ClassilBcation. — There are only two species, which m2.y be dis- 

 tinguished as follows: — 



A. Cultures cerebriform — Flavum. 



B. Cultures crateriform and creased — Plicatile. 



Neotrichophyton flavum Bodin, 1902. 



Synonym. — Trichophyton cerehriforme S?^oviTd.\xdi, K)0(). 



Differs from Trichophyton tonsurans by the cultures being cere - 

 briform, and by becoming creamy-white when old. 



Pathogenicity. — Induces a type of tinea corporis and a form of 

 sycosis. Inoculable into guinea-pigs. 



Neotrichophyton plicatile Sabouraud, 1909. 



Synonym. — Tricophyton plicatile Sabouraud, 1909. 



Colonies closely resemble those of Trichophyton tonsurans, but 

 have a creased appearance with white, powdery surface. Found by 

 Sabouraud in cases of sycosis. Sequeira has observed it in a case of 

 trichophytic granuloma. 



Genus Ectotrichophyton Castellani and Chalmers, 1918. 



Definition. — Trichophytonese with mj^celium and spores present 

 in the lesions, and conidial-bearing hyphfe in cultures ; attack hairs 

 and hair follicles, growing in and on the surface of the hairs; is often 

 pyogenic and of animal origin. 



Type Species.- — Ectotrichophyton mentagrophytes Robm, 1853. 



Classification. — The genus is capable of division into three sub- 

 genera by the following characters: — 



A. Ectotrichophyton : — • 



With small spores about 3 to 4 microns in diameter, forming a sheath 

 outside the hair shaft, on dissociation of which they are seen to 

 form chains; with sinuous and quadrangular hyphal segments, 

 together with spores of varying diameter and air-bubbles, inside 

 the hair shaft; with cultures easily obtainable, of rapid growth, 

 and of considerable vitality, characterized by plaster-like or floury 

 centres surrounded by a fringe, when grown on Sabouraud's proof 

 media, and by successful inoculations into animals — Subgenus 

 Microtrichophyton. 



B. Ectotrichophyton : — 



With large spores about 5 to 7 microns in diameter, forming a sheath 

 outside the hair shaft, on dissociation of which they are seen to 

 form chains, and with sinuous hyphal segments, together with 

 large-sized spores and air-bubbles, inside the hair shaft; with 

 cultures easily obtainable, but of slow growth in temperate 

 climates, though much more rapid in tropical climates, character- 

 ized by their tendency to resemble (at all events when old) those 

 of the Achorions, and capable of being inoculated into animals — 

 I. With early formation of a duvet — Subgenus Ectotrichophyton . 

 II. Culture sooner or later resembles that of Achorion schoen- 

 leini — Subgenus Favotrichophyton. 



