CRYPTOCOCCUS DERMATTTlDIS 



and Lesieur, 1912; C. rogeri Sartory, 1911; and C. linguce-piloscB 

 Lucet, 1 901. 



According to most authors, Histoplasma capsulatunt Darling, 

 1906, is not an animal but a vegetal parasite, and should be classified 

 as a cryptococcus. 



The parasite found in cases of chronic ulcerative dermatitis in 

 America, and named Cryptococcus dermatitis Gilchrist and Stokes, 

 according to some authors, does not belong to the genus Crypto- 

 coccus of Kiitzing, but to the genus Mycoderma of Persoon, 1822 ; 

 but we have retained it under Cryptococcus. 



Recently Chalmers and Christopherson in the Anglo-Egyptian 

 Sudan have found a cryptococcus in a peculiar disease consisling of 

 spreading warts, to which they have given the name Murmekias- 

 mosis amphilaphes. As the cryptococcus is closely associated with 

 the condition, they have named it C. fnyrmecice Chalmers and 

 Christopherson, 1914, but they were unable to prove conclusively 

 that it was the setiological factor, though they brought forward 

 some facts to support such a contention. 



Cryptococcus dermatitidis Gilchrist and Stokes, 1898. 



Synonyms. — Blastomyces dermatitis Gilchrist and Stokes, 1898; 

 Cryptococcus gilchristi Vuillemin; Zymonema gilchristi de Beurmann 

 and Gougerot. 



Found by Gilchrist and Stokes in a case of chronic ulcerative 

 dermatitis, and later in a case which had been diagnosed as a 

 tuberculide of the skin. After Gil- 

 christ and Stokes's cases, other cases 

 of blastomycosis due to an identical 

 or similar organism have been 

 described by Hyde, Oppenheim, 

 Ricketts, and others. Ricketts con- 

 sidered these fungi to be species of 

 Oidium, and proposed the name 

 ' oidiomycosis ' to indicate the 

 disease produced by them. 



C. dermatitidis in the affected tis- 

 sues has the appearance of a typical Fig. 558. — Cryptococcus dermati- 

 yeast— large globular cells, 10 t^^dis Gilchrist and Stokes. 

 to 16 fjb in diameter, reproducing (After Gilchrist.) 



by budding. In cultures, which are 



white, besides these globular elements, rudimentary mycehal tubes 

 may occasionally be found, presenting lateral or terminal conidia ; 

 asci are absent. The fungus does not ferment sugars, and there 

 is no formation of a pellicle. Gelatine not liquefied. 



Cryptococcus hominis Vuillemin, 1901. 

 Synonyms. — Saccharomyces (sp. ?) Busse, 1894; Atelosaccharo- 

 myces ousse-huschki de Beurmann and Gougerot, igog; Atelosaccharo- 

 myces rudeli de Beurmann and Gougerot, loii. 



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