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BACILLUS OF RHINOSCLEROMA. 



Frisch (1882). 



Origin. In the tumors of rhinoscleroma, a rather 

 rare disease occurring in Austria and Italy. 



Form. Short, thick rods with rounded ends resem- 

 bling the Friedlaender's pneumobacillus, may form short 

 threads. Are likewise surrounded by a colorless capsule. 

 Cells of Mickulicz. 



Motility. Has no motion. 

 Sporulation. Not observed. 



Anilin Dyes. Stain readily, and show colorless 

 capsule; also stained by Gram's method. 



Growth. Growth resembles in almost every respect 

 that of the Friedlaender bacillus, The colonies, stich and 

 streak cultures, agree so closely as to be scarcely distin- 

 guishable. 



Oxygen requirements. Is a facultative anaerobe. 

 Temperature. Grows rapidly at ordinary tempera- 

 ture. The optimum is about 36-38 <J. 



Behavior to Gelatin. Not liquefied. 

 Aerogenesis. Gas produced by potato cultures. 



Pathogenesis. The relation of this bacillus to rhin- 

 oscleroma has not been positively established. It has less 

 virulence than the Friedlaender bacillus. Is pathogenic 

 for mice and guinea-pigs, Rabbits are less susceptible. 



