320 NON-SACCHAROMYCETES OR DOUBTFUL YEASTS 



CRYPTOCOCCUS OVOIDEUS. Anderson 



" Morphology. Cells in young cultures are round or oval, and 

 fairly uniform in size and shape; in old culture cells are oval or 

 broadly elliptical, varying markedly in size and with few budding cells. 

 There are no elongated cells or hyphal elements. The size is 3.5 X 4.5ju. 

 ''Cultural Characters. On glucose agar the streak is filiform, 

 slightly raised, glistening, smooth, and chalk-white. The growth is 



slow and there is little change in 

 old cultures. There is a filiform 



CpO (h- (ruC} g r wth in gelatin stab, with no 



\j Qp CQ cPO liquefaction. No pellicle or ring is 



(J O present in beer wort or in liquid 



2 sugar mediums. 



Fig. 145-B.- .Ciyptococcu* ovoideus, "Physiologic Characters. There 

 Anderson. . 



1, Cells from Young Beer Wort Culture; 2, Cells IS Slight fermentation OI gluCOSC, 



levulose, and sucrose. This occurs 



only after a week and the production of gas is never over 10 per cent 

 of the closed arm of the tube. No decided change in acidity occurs 

 in sugar mediums. There is no change in litmus milk. 



"The culture was isolated from human feces. 



"This species is very similar in many of its characters to Culture 

 170.101. The latter, however, ferments glucose and levulose very 

 rapidly and completely. Both of these cultures are slow growing, 

 very smooth and remain white and even-edged in very old cultures. 

 The surface elevation is not so decidedly convex as in most yeasts of 

 the white, glistening type." 



CRYPTOCOCCUS GLABRATUS. Anderson 1 



"Morphology. Cells in young cultures are oval or 

 elliptical, and fairly uniform in size and shape; in old 

 cultures cells are round, oval, or* elliptical and more 

 variable in form and size. Budding occurs from the ends 

 or shoulders of the oval and elliptical cells. There 

 are no elongated cells or hyphal elements. The size is 

 3 X 4.5 M- 



"Cultural Characters. On glucose agar the streak is 

 filiform, glistening, raised, smooth, and chalk-white. In Fig. 145-C. 

 old cultures the surface remains smooth and the edge 



entire. There is a slow growth on all solid mediums; i, ceils from Young 

 liquid mediums remain clear with little evidence of at 

 growth, and no pellicle or ring formation is present. 



1 Anderson, H. W. See reference for Cryptococcus verrucosus. 



