ECTOTRICHOPHYTON {FAVOTRICHOPHYTON) 1003 



Ectotrichophyton (Favotrichophyton) Castellani and Chalmers, 



1918. 



Definition. — Ectotrichophyton with the characters given above 

 for Favotrichophyton. 

 Type Species. — Ectotnchophvion discoides Sabouraud, 1909. 



Fig. 506. — Ectotvichophyion dis- 

 coides : Nineteen Days' Growth 

 ON Sabouraud's Maltose Agar 

 AT 32° C. 



Fig. 507. — ■ Ectoirichophylon dis- 

 coides: Forty-two Days' Growth 

 on Sabouraud's Maltose Agar 

 AT 32° C. 



Classification. — The Favotrichophyton species which are known 



are: — _ ^ 



E. verrucosum Bodm, 1902, 



E. ochraceum Sabouraud, 1909, 



E. album Sabouraud, 1909, 



E. discoides Sabouraud, 1909, 



E. luxurians Brault and Viguier, 1914. 



which may be differentiated as follows: — 



A. Condition of mycelium in hair not definitely stated: — 



I. Young cultures white in colour, and soon resembling those of 

 Achorion schoenleini, but sunk into the medium — Album. 



B. Condition of mycelium in hair that of an ecto-endothrix: — ■ 



II. Cultures grey in colour, humid, with verrucose surface — Verru- 

 cosum 



III. Young cultures of a yellow ochre colour — Ochraceum. 



IV. Cultures yellowish-brown or greyish-yellow, cupola-shaped, 



humid, with usually smooth surfaces, and not resembling the 

 Achorion cultures until old — Discoides. 

 V. Very rapid devQ\oY>mer\i— Luxurians. 



Ectotrichophyton verrucosum Bodin, 1902 



Synonym.- — Trichophyton vermcosam Bodin, 1902. 



Endo-ectothrix, megalosporon, faviform. This fungus, though 

 producing typical trichophytic lesions when parasitic, shows cul- 

 tural characters somewhat similar to an achorion, the growth, 

 which is white, being often convoluted or cerebriform. It is 



