PARASACCHAROMYCES THOMASII 



365 



alv/ays clots milk and liquefies gelatin. Monilia albicans, Oidium 

 albicans and Endomyces albicans are synonyms, and if Vuillimin's ('99) 

 results are accepted and are of general application to all of these, the 

 correct name for the species is Endomyces albicans, since he states 

 that this species forms asci after the manner of other species of the 

 genus Endomyces. Since all efforts to develop the perfect stage of 

 the sprue organism, both by Dr. Ashford and myself, ended in failure 

 and since it differs in many of its physiologic characters from the typical 

 Endomyces albicans, it has been thought best to give it specific rank 

 rather than to regard it as a variety of Endomyces albicans.'' 



PARASACCHAROMYCES THOMASII. Anderson 1 



"Morphology. In young cultures, cells are elliptical or ovate; 

 in old cultures, surface cells are round, oval, elliptical, or elongated; 

 submedial cells form a distinct mycelium mostly by elongation of cells 

 produced by budding. There is occasional septation in gelatin hang- 

 ing-drop. Budding occurs 

 from ends or shoulders. 

 The size is 3.5 x 5 p. 



11 Cultural Characters. 

 On glucose agar the streak 

 is, at first, white, glistening, 

 convex, and smooth; later 

 the surface becomes rugose 

 with a decidedly elevated Fig. 155-B. Parasaccharomyces Thomasii, An- 

 ridge down the center. derson. 



Beneath the surface of the, 

 medium the radiating hy- 

 phae form a villous fringe. In beer wort and liquid sugar mediums 

 no pellicle or ring is present. In gelatin-stab cultures the growth is 

 finely villous. Giant colonies in beer wort gelatin are decidedly yellow 

 in color and otherwise very characteristic. 



"Physiologic Properties. Slow fermentation of glucose, levulose 

 and maltose. In litmus milk there is a decided alkaline reaction. 



" The culture was isolated from human feces. 



" The species is similar to Parasaccharomyces Ashfordii in its physi- 

 ologic properties. It differs mainly in its morphologic characters 

 and the type of giant colonies produced. The yellow, rugose colony 

 in beer wort gelatin is especially characteristic and easily distinguishes 

 in this species from P. Ashfordii." 



1, Cells from Young Beer Wort Culture; a, Elongated Cells 

 Forming a Pseudo-mycelium Beneath the Surface of an 

 Agar Slant; b, Cells from the Surface of the Same Culture. 



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

 Infectious Diseases 21 (1917) 341-386. 



Jour. 



