510 MEDICAL MYCOLOGY 



TricJiophyton equinum Gedoelst, Champ. Paras. Homme 88, 89, 1902 ; 

 Gueguen, Champ. Paras. Homme 140, 1904. 



Ectotrichophyton equinum Castellani & Chalmers, Man. Trop. Med. ed. 3, 

 1007, 1919. 



Probably not Trichophyton depilans Megnin, Arch. Gen. Med. 141: 294- 

 304, 1879; Weber & Megnin, Bull. Soc. Centrale Med. Vet. 1247-1250, 1882, 

 nor T. flavum Sabouraud ap. Bodin nor T. cerehriforme Sabouraud, 1910. 



Isolated from lesions on horse and man. Skin roughened, soon peeling 

 off a large area of epidermis, taking all the infected hairs with it, leaving a 

 glabrous, moist, rose-colored surface which becomes grayish. As the spot 

 dries, it becomes furfuraceous or powdery and deep bluish gray. In spon- 

 taneous lesions in man, central zone pale rose, transversally striate, surrounded 

 by a red ring about 3 mm. wide, scarcely scaly, then a whitish zone, somewhat 

 crustose from the remains of small vesicles, and a margin of small j^ellowish 

 vesicles, the size of a pinhead and slightly elevated. Twice isolated from the 

 beard, where it was producing kerion. Also inoculable into guinea pig. Oc- 

 casional in France, rare in Germany, Hungary, Minas Geraes in Brazil, and 

 Uruguay. 



Arthrospores in hair 4-6 x 2-4/a. Mycelium abundant, 2-3/t, branching at 

 right angles; aleurospores 2-3 x 3-4/i, ovoid, pedicellate solitary; chlamydo- 

 spores variable, 3-10 x 2-3/x; spirals well developed on cereal media (Lebasque, 

 1934). 



Colony white, floccose, circular; reverse yellow then mahogany red, pig- 

 ment diffusing into the medium. On carrot slice, mycelium less abundant, 

 less floccose, sometimes light rose, becoming yellowish in the moister regions 

 of the culture. On potato, growth slow, producing abundant yellow pigment 

 with gradual adaptation to the medium until good growth occurs. On horse 

 dung, growth poor. On cereals, growth cottony, white becoming yellowish 

 and powdery in age. 



Megatricliopliyton roseum (Bodin) Dodge, n. comb. 



Trichophyton roseum Bodin, Champ. Paras. Homme 120, 121, 1902. 



Trichophyton a culture rose Sabouraud, Ann. Derm. Syphiligr. Ill, 4: 833, 

 1893. 



Trichophyton rosaceum Sabouraud. Arch. Med. Exp. Anat. Path. 21: 274- 

 298, 1909. 



Ectotrichophyton {Euectotricliophyton) Megnini Castellani & Chalmers, 

 Man. Trop. Med. ed. 3, 1007, 1919 not T. Megnini Blanchard, which is a 

 synonym of Achorion gallinae. 



Megatrichophyton Megnini Neveu-Lemaire, Precis Parasitol. Hum. 54, 1921. 



Aleurosporia rosacea Grigorakis, Ann. Sci. Nat. Bot. X, 7: 413, 1925. 



Trichophyton {Aleurosporia) rosaceum Guiart & Grigorakis, Lyon Med. 

 141: 377, 1928. 



Lesions may be either in epidermis or hair follicles, usually of beard and 

 without inflammation. Inoculable to guinea pig. Common in north of Eng- 

 land, where it seems to be spread in barber shops rather than by animals. 



