104 TRANSFORMATION OF THE INTESTINAL FLORA 



The typical mixed flora again appeared within ten days after discon- 

 tinuance of the acidophilus milk. 



Note. — In the search for B. hulgaricus in the whey agar plates of the fecal sus- 

 pensions from the subjects receiving milk cultures of B. hulgaricus, several fluffy 

 colonies resembling B. hulgaricus and B. acidophilus were fished from each set of 

 plates. For identification the maltose test advocated by Rahe (1914) and studied at 

 some length by us was utilized. None of the transplants from the plates failed to 

 utilize maltose with acid production, and in every other respect there was lack of 

 evidence of the presence of B. hulgaricus. 



TABLE 68— SUBJECT D 



Ordinary Daily Diet + B. Acidophilus Milk 500 cc. 



The following two confirmatory experiments were carried on with 

 pure cultures of B. hulgaricus. Subjects F and H each received 300 

 cubic centimeters of a whey broth culture of the given organism daily 

 for ten days, in addition to the usual diet. 



