520 MEDICAL MYCOLOGY 



Favotrichophyton expansum (Cazalbou) Dodge, n. comb. 



f Tricliophyton 'planum fiiscolargum Eosenbach, Ueber die tief en eiteren- 

 den Schimmelerkrankungen der Haut 34, 1894. 



Trichophyton expansum Cazalbou, Rev. Gen. Med. Vet. 24: 7. 8, 1914. 



Produced isolated lesions the size of a 5-franc piece, covered with a thick 

 crust of gray scales on two Norman bulls from Mayenne, France. Not re- 

 ported since original case, 



Arthrospores about the roots of the hairs, 4-6/x and large, slightly sinuous 

 hyphae invading the hair. 



Primary cultures produce small rounded yellowish masses. In older cul- 

 tures and in subcultures a large cerebriform much folded central mass with a 

 yellowish gray smooth border under the surface of the medium. On Sabou- 

 raud maltose the folds are thicker, less numerous and covered with a fine 

 white velvet. On Sabouraud glucose, colonies still glabrous and yellow at 

 the center. After pleomorphism has set in, colony has a small wrinkled cen- 

 ter with somewhat irregular radial folds and furrows, about 5 of the former 

 and 12 of the latter. 



Favotrichophyton coronatum (Cazalbou) Dodge, n. comb. 



Trichophyton coronatum Cazalbou, Rev. Gen. Med. Vet. 24: 3, 4, 1914. 



Produced lesions on backs of 2 bulls and an ox, with crusts of cacao color. 

 France. Not reported since original case. 



Fungus ectothrix, arthrospores 6/*. 



Cultures small grayish or yellowish buttons, central area 8-10 mm., crater 

 with folded edges, slightly eccentric, festooned around the base, a crown of 

 fiine silver white velvet 2-3 mm. broad. Somewhat resembles T. ochraceum 

 Sabouraud, but differs in the marginal crown and is not inoculable into the 

 guinea pig. 



Favotrichophyton pruinosum (Catanei) Dodge, n. comb. 



Trichophyton pruinosum Catanei, Bull. Soc. Path. Exot. 24: 296-301, 1 pi., 

 1931; Arch. Inst. Pasteur Algerie 11: 347-349, PI. 42, Figs. 9-15, 1933. 



Isolated from a sheep, lesion of ectothrix megaspore type. Inoculation 

 into sheep gave crusts which lasted 2 months but lesion finally disappeared. 

 Inoculable to guinea pig, crust showing the tenth day, healing spontaneously 

 within 3 weeks. Inoculable to calf, thick scales in 12 days, spontaneous heal- 

 ing in 6 weeks. 



Spores in sheath and in hair 3.5-4/a in diameter. In culture, hyphae 4-4.5 fx, 

 septate, branched; arthrospores in simple or branched chains, 4-10/a long, 

 averaging 6-7^; terminal and intercalary chlamydospores present. The my- 

 celium sometimes shows abortive beginnings of branches but no true aleuro- 

 spores. 



No isolation at 22° although transplants grew at this temperature. On 

 Sabouraud agar, primary colonies slightly elevated, glabrous and irregular 

 3-12 mm., margins with short rays, color varying from that of F. violaceum 

 to a grayish yellow. Secondary colonies glabrous, slightly elevated, irregular, 

 violet brown or brownish yellow, with small central dome 1.5-2 mm. high and 



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