Sarcina Lutea, Schroter. 



YELLOW SABCINB.' 



Origin. ^ — Air. 



Form. — Larger cocci than the orang-e sarcine, and 

 moreover, it forms more perfect package-shaped masses. 



Motility. ^None. 



Sporulation . — None. 



Anilin dyes. — React readily and are likely to over- 

 stain. The characteristic division of the cells is then lost. 



Growth. — ^Very slow. 



Gelatin pZates.— Colonies develop very slowly as minute yellowish 

 spots, which, show an irregular oblong- form and are markedly granular. 

 The colonies do not liquefy gelatin. 



Stab cultv/re.— Growth is especially developed on the surface and 

 extends but slightly down the line of inoculation. Lower half of 

 tube is usually free from growth, or at most, contains a few, isolated, 

 spherical colonies. The color is bright yellow and in very old tubes 

 liquefaction slowly shows itself, so that eventually a bright yellow 

 deposit forms on the bottom while the supernatant liquefied gelatin 

 is perfectly clear. 



Streak culture. — On agar, it forms a very thick, moist, bright 

 yellow covering. On potato, the growth is slow, with production of 

 the same thick growth and color. 



Oxygen requirements. — It is an aerobic organism. 

 Temperature. — It may grow in the incubator. 

 Behavior to gelatin. — A very slow liquefaction is ob- 

 served after a lapse of several weeks. 

 Pathogenesis. — None. 



The sarcine form was first observed in 1842 in vomited 



stomach contents and was designated as S. ventriculi. 



Within recent years a stomach sarcine has been isolated in 



pure culture and found to correspond, in many respects, to 



the yellow sarcine. More than one species, however, may 



exist in the contents of the stomach. 



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