484 



BACTERIOLOGY. 



It does not produce indol. 



It doeri not cause fermentation of glucose. 



It is motile. 



In milk containing blue litmus tincture it causes 

 almost complete decolorization in from three to four 

 days at 37° C, with coincident coagulation of the 



Fig. 87. 



abed 



stab-culture of Miller's spirillum in gelatin, at 18° to 20° C. 



a. After twenty-four hours, b. After forty-eight hours, c. After seventy-two 



hours, d. After ninety-six hours. 



casein and the formation of a layer of clear whey 

 about it. 



It causes the red color of rosolic-acid-peptone solu- 

 tion to become somewhat intensified after four or iive 

 hours at 37° C. 



