344 SPECIFIC MICRO-ORGANISMS 



pigment which is soluble in water. Gelatin is not liquefied. 

 B. cyanogenus sometimes causes trouble in dairies as its growth 

 in milk imparts a blue color to it. 



Bacillus Prodigiosus. This small oval organism grows rapidly 

 at room temperature on ordinary media and is occasionally 

 observed on foodstuffs such as moist bread and potatoes. Ordi- 

 narily it is encapsulated and non-motile, but it sometimes possesses 

 flagella. Gelatin is rapidly liquefied. A red pigment is produced 

 at room temperature but not at 37 C. This pigment is insoluble 

 in water. Large doses of B. prodigiosus injected into animals 

 sometimes gives rise to signs of intoxication. 



