102 STUDY AND IDENTIFICATION OF MOULDS. 



only in acid media. Hence propriety of alkaline 

 treatment. 



Cryptococcus. Reproduces by budding, but ascospore formation not 

 observed. Not a well-recognized genus. The diseases 

 caused by it are termed blastomycoses. 



C. Gilchristi. The cells are about i6/z in diameter and have 

 a thick membrane. They reproduce by budding. 

 May invade internal organs. It is cultivable. A 

 mould, somewhat similar, is the Coccidioides im- 



FIG. 40. Thrush fungus. (Kolle and Wassermann.) 



mitis of Ophuls. This has a mycelial growth. 

 The infection frequently becomes generalized. 

 The small bodies, about 3//, in the Molluscum con- 

 tagiosum cells are thought by some to be yeasts. 

 They are more probably artefacts. Plimmer's 

 bodies in cancer cells belong in this group. They 

 also are probably other than parasites. 



Gymnoasci. Belonging to the family Gymnoasci we have the 

 genera Trichophyton, Microsporum and Achorion. 



The trichophytons are generally known as the large-spored ring- 

 worms. The spores are in chains and may be inside the hair or both 



