MALASSEZIA FURFUR 



1099 



Malassezia furfur Ch. Robin, 1853. 



Synonyms. — -Microsporon furfur Ch. Robin, 1853; Sporotrichum 

 furfur Saccardo, 1886; Malassezia furfur Baillon, 1889; Oidium 

 furfur Zopf, 1890; 0. subtile Kotliar, 1892. 



Mycelium abundant, septate, non-ramified ; some mycelial threads 

 are much larger than others; the breadth varies between 3 and 4 /ll. 

 The spores are roundish (3 to 5 in diameter), and run into clusters. 



Attempts at cultivation have failed. It is the cause of pityriasis 

 versicolor. 



Malassezia tropica Castellani, 1905. 



Synonym. — Microsporon tropicum Castellani, 1905. 

 Mycelial threads generally thick (3 to 5 wide), with numerous 

 swellings, constrictions, and other irregularities of shape; spores 



roundish (4 to 5 fA,), with a double 

 contour; are often collected in 

 clusters. The fungus does not 

 grow on artificial media. It is 

 the cause of tinea fiava or pity- 

 riasis flava of tropical climates. 



Fig. 580. — Cladosporium mansoni Fig. 581. — Cladosporium mansord 

 Castellani. Castellani. Hanging-drop Cul- 



{From a preparation stained by ture. 

 fuchsin.) 



Family 5: Cladosporiace^ Saccardo, 1886. 



Definition.— Blastosporales with hyphae manifest and distinct from 

 the conidia, which are either solitary or arranged in short chains. 



Remarks.— We are only concerned with the type genus Clado- 

 sporium Link, which may be recognized as follows: — 



Conidia smooth, not capitate, more or less in chains at first. Hyphae 

 and conidia uniform. Hyphae not inflated, but decumbent; conidia 

 in short chains and finally solitary— Genus Cladosporium Link, 1809^ 



