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BACTERIUM ZOPFII. Kurth. 



Origin. From the intestines of chicken. 



Form. Rods, 2 to 5 times as long as wide. Forms 

 threads, which in gelatin are often peculiarly bent or 

 twisted. 



Motility. Actively motile. 



Sporulation. Spore-like bodies are formed, which 

 resist desiccation, but are readily destroyed by heat, and 

 are readily stained by anilin dyes. 



Anilin Dyes. Stain easily. 



Growth. Rapid. 



Gelatin Plates. The colonies form delicate cloudy patches of radiating 

 threads, and under the microscope show, in addition to the network of 

 threads, numerous rounded little masses or bunches of cells. 



Stick Cultures. Marked growth in the upper part of the tube and almost 

 absent in the lower part. Shows fine radiating lines which, at or near the 

 surface, penetrate deepest into the surrounding gelatin. 



Streak Cultures. On agar, forms a very thin, dry, grayish growth. 



Oxygen requirements. Is aerobic. 



Temperature. Grows best at ordinary temperature. 

 Can grow at 37-40, but tends to develop involution forms 

 and to die out. 



Behavior to Gelatin. Is not liquefied. 



Pathogenesis. No effect on animals. 



NOTE. Make "Klatsch" or impression preparations of the colonies. 



