MYCODERMA RUGOSA 341 



MYCODERMA MONOSA. Anderson 1 



"Morphology. Cells in young cultures are elliptical or narrowly 

 elliptical; in old cultures cells are of various forms, predominantly 

 elliptical, with numerous elongated and 

 irregular forms. Rows of elongated Q 



cells in old cultures form a false my- @ Q rt ^0 

 celial development. No true septation U 



is observed. Budding occurs from the 

 ends or from shoulders of the young 



cells. The size is 2 X 5.5 /i. Fig. UW.-Mycoderma monosa, 



"Cultural Characters. On all agar Anderson. 



Slants the Streak is Spreading, dull, 1, Cells from Young Beer Wort Culture; 



' 2, Cells from Old Culture. 



white, flat, and becoming gray with age. 



A heavy dull pellicle is formed within 24-48 hours on all liquid sugar 



mediums and on beer wort. There is a villous growth along stab in 



gelatin. 



"Physiologic Properties. Glucose and levulose ferment readily. 

 There is no change in litmus milk. Sugar mediums, with an original 

 acidity of - 1, become less acid after 1 week. The culture was isolated 

 from human feees." 



MYCODERMA RUGOSA. Anderson 



Anderson isolated this yeast from human feces and characterized 

 it as follows: 



"Morphology. Cells in young cultures are elliptical, oblong, 

 elongated, or somewhat irregular; in old cultures the cells on the sur- 

 face of the medium are oblong, 

 f\ ovate or elongated; beneath the 

 ()/} surface very long, narrow cells of 

 hyphal character are produced by 

 the elongation of the bud at the 

 distal end of another elongated cell. 

 Fig. UG-T>. Mycoderma rugosa, An- No septate mycelium is formed, 

 derson. Budding in young cells occurs from 



1, Budding Cells from Young Beer Wort Culture; en( J Qr SnO ulder. The size is 3 X 

 2, Cells from Old Culture. 



6.5 /*. 



"Cultural Characters. On glucose agar slant the streak is white, 

 dull, and flat, but not spreading; later the surface becomes glisten- 

 ing and decidedly rugose and pitted. Bushy growths may extend 



1 Anderson, H. W. Yeast-like fungi of the human intestinal tract. Jour. 

 Infectious Diseases, 21 (1917), 341-386. 



