MOULDS 



177 



Pityriasis Versicolor This is a disease chiefly of unclean 

 persons produced by the development of Microsporon furfur 

 in the superficial layers of the epithelium. It may appear 

 anywhere 'on the body, but chiefly affects the short-haired 

 skin. It is very slightly contagious. 







FIG. 58. Oidium albicans: g, conidia; e, pus cells, 

 and Wassermann.) 



(From Plaut, in Kolle 



Diagnosis. The diagnosis of these conditions depends 

 upon finding the particular fungus. Some of the pus from a 

 blastomycotic abscess or some of the scales from the under- 

 side of the crusts of the skin diseases produced by moulds 

 is softened in weak caustic and examined in a moist condition 

 under the microscope. The single or budding cells of the 

 yeasts or the branching mycelia of the moulds are usually 

 found with ease. In case it is desirable to cultivate the fungi 

 a long elaborate technic is necessary. 

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