TRICHOPHYTONEAE 501 



This variety was thought to be a pleomorphic form of Epidermophyton 

 ruhrum to wliich T. rubidmn of Priestley and E. lanoroseum MacCarthy were 

 also referred. A careful reading- of the original descriptions shows that this 

 species is quite distinct from both in its cultural characters and its inoculability 

 into guinea pigs, where it produces a wholly different type of lesion. The abun- 

 dance of elosterospores militates against considering it as a pleomorphic strain 

 of some other species. It is reported to be distinguished from T. coccineum 

 Kato and T. lileiim Kawasaki by the presence of elosterospores. 



Ectotrichophyton lacticolor (Sabouraud) Castellani & Chalmers, Man. 

 Trop. Med. ed. 3, 1006, 1919. 



Trichophyton lacticolor Sabouraud, Maladies du cuir chevelu 3: 362-368, 

 1910. 



^Trichophyton hoJosericum album Rosenbach, Uber die tiefen eiternden 

 Schimmelerkrankungen, der Haut. 27, 1894. 



Sahouraudites (Aleuramma) lacticolor Ota & Langeron, Ann. Parasitol. 

 Hum. Comp. 1: 329, 1923. 



Chlamydoaleurosporia lacticolor Grigorakis, Ann. Sci. Nat. Bot. X, 7: 412, 

 1925. 



Trichophyton (Chlamydoaleurosporia) lacticolor Guiart & Grigorakis, Lyon 

 Med. 141: 377, 1928. 



Trichophyton gypseum var. lacticolor Ballagi, Derm. Woch. 83 : 1155-1169, 

 1926. 



Producing multiple kerions of the beard. Easily inoculable to guinea pig. 

 Rare, reported from France, Germany, Sweden, Hungary, New York, Sao 

 Paulo in Brazil, and Japan. 



Aleurospores on long simple sporiferous hyphae, or short and branched 

 hyphae ; characteristic nodular organs. On cereal media, spirals abundant, 

 aleurospores as above, but better developed, elosterospores abundant on bar- 

 ley. Dimorphism of sporiferous hyphae and sterile hyphae greater, and 

 elosterospores present on soluble starch or dextrin with peptone, but no 

 elosterospores in the absence of peptone. 



Primary cultures flat discs, with shallow radial furrows, cream yellow, sur- 

 face suggesting hot curdled milk. On conservation media, colony a truncated 

 cone, with radiating furrows and a very deep crater with short white velvet. 

 Pleomorphic colony center slightly elevated, with a comparatively broad ir- 

 regular crater whose sides are relatively lower as the colony ages ; reverse 

 canary yellow. 



The nodular organs reach their highest development in this species. These 

 organs develop from rows of cells which resemble a young closterospore, the 

 cells elongate and begin to curve and even coil until a dense mass of large 

 thick-walled chlamydospores is formed. These organs are sometimes sessile, 

 sometimes pedicellate. They are often surrounded by a mass of flexuous 

 hyphae which may be the germ tubes of the chlamydospores germinating in 

 situ. Spirals and true elosterospores not produced on Sabouraud agar, al- 

 though present on other media. 



