TRICHOPHYTONEAE 535 



Var. pilosum Dodge, n. var. 



Trichophyton pilosmn Sabouraud, Maladies du cuir chevelu 3: 313, 1910. 



Similar clinically, morphologically, and in animal inoculation to T. Sahour- 

 audi. North Italy, reported also from Mexico (Gonzales Uruena 1932). 



Colony covered with a short dense velvet instead of the rose brown 

 powder of the species. This difference has remained constant in culture. 



Trichophyton soudanense Joyeux, C. K. Soc. Biol. 72: 15, 16, 1912; Arch, 

 de Parasitol. 16: 449-460, PI. 7, Figs. 1-6, 1914. 



Trichophyton sudanense Bruhns & Alexander in Jadassohn, Handbuch 

 Haut- Geschlechtskrankh. 11: 155, 156, 1928. 



Producing tinea capitis (up to 80% infection of children) in Haute Guinee, 

 rare on the coast. Inoculation of experimental animals negative. Catanei 

 (1933) working with strains from the Sahara succeeded in producing transi- 

 tory lesions with a few infected hairs in two out of four inoculated guinea 

 pigs and a squamous lesion in a monkey which healed spontaneously in about 

 2 months. Broken hairs in the scales showed endothrix type of infection. 



In hairs, arthrospores cylindric or rounded, 2.8-4.5 x 4;*; aleurospores in 

 either simple or compound thyrses; arthrospores and chlamydospores abun- 

 dant ; on barley, a few atypical closterospores are produced. 



Colony a small apricot yellow peak which grows and becomes irregularly 

 folded ; about the ninth day the base expands, radiating in a white mat, with 

 radial folds. 



Trichophyton louisianicnm Castellani, New Orleans Med. Surg. Jour. 79: 

 629, 896-899, 1927, probably is a synonym, representing an American strain 

 of this species brought over to America during the African slave trade, since 

 it appears confined to negroes. It is probably not closely related to T. sulphu- 

 reum as Castellani suggests. Lesions oval, with abundant scaling (a yeast 

 often present in the scales, probably a saprophyte). Occasionally thick moist 

 crusts produced rather than scales. 



On acid glucose agar, center white, margin yellowish, submerged portion 

 shows from one to several spots of reddish or brownish red color. Yellow 

 color more marked on glucose peptone agar. On casein digest + 3% agar, 

 submersed growth, reddish or yellowish red. On acid maltose, yellow color 

 may be less marked or even absent. Gelatin agar, growth knobby, almost 

 cerebriform, covered with white velvet, margin yellowish. Glycerol agar, 

 growth white, sometimes tinged yellow. Gelatin slowly liquefied after 3-4 

 days. No gas with sugars. No closterospores or other spores mentioned, but 

 chlamydospore crudely figured. 



Doubtful Species 



The following species are either nomina nuda, poorly described or with 

 descriptions which I have been unable to find, owing to poor bibliographic 

 data. 



Trichophyton Blanchardi Castellani, Arch. Derm. Syphilis 93: 32, 1908. 



Trichophyton Sahouraudi Castellani, 1905? not Blanchard, 1896. 



