40 STUDY AND IDENTIFICATION OF BACTERIA. 



For routine work the only sugar media used are the glucose and the 

 lactose bouillon. These are of the utmost importance in differentia- 

 ting organisms of the typhoid and colon group. Following Ford, these 

 intestinal bacteria have primarily been separated by their action on 

 litmus milk whether turning it pink or only slightly changing or 

 not changing at all the original color. 



