98 ESSENTIALS OF BACTERIOLOGY 



containing small flakes of red pigment which settle at the 

 bottom. Milk coagulated in twenty-four hours. - 



Agar Colonies. Small red points in thirty-six hours, irregu- 

 lar in outline. Granular in structure. 



Gelatin Colonies. On the surface, round, granular, smooth 

 edges which soon liquefy and have depression in center. The 

 edges then become irregular. 



Biologic Features. The characteristic red pigment is in- 

 soluble in water, slightly soluble in alcohol and ether; alka- 

 lies turn it orange, acids, violet red. Light fades it. Gases 

 of methylamin and ammonia are produced. Gas and acid 



produced in sugar solutions. 

 Indol feeble. 



Temperature, 22-2$ C. ; higher 

 temperatures interfere with pig- 

 ment. 



Pathogenic for small animals. 

 When injected intraperitoneally, 

 1-2 c.c. has proved fatal; causes 

 intoxication. Proteids of the cul- 

 tures poisonous. 

 Fig. 3 8.-Colony of Bacillus Cancer Remedy. Used in 

 mesentericus vulgatus. Coley's treatment mixed with 



cultures of streptococci. 



Bacillus Mesentericus Vulgatus (Bacillus Vulgatus; 

 Potato Bacillus of Fliigge) (Fig. 38). 

 Origin. Surface of the soil, on potatoes, and in milk. 

 Form. Small thick rods with rounded ends, often in pairs. 

 Very motile; produces abundant spores. 

 Cultures. Rapid growth; stain with Gram. 

 Agar Colonies. Round, with transparent center at first, 

 then becoming opaque. The border is ciliated; little pro- 

 jections evenly arranged. 



Potato. A white covering at first, which then changes to 

 a rough brown skin; the skin can be detached in long 

 threads. 



Temperature. Spores at ordinary temperature. 



