126 TRANSFORMATION OF THE INTESTINAL FLORA 



CAMERA LUCIDA DRAWINGS OF GRAM-STAINED FILMS OF 



STANDARDIZED FECAL SUSPENSIONS FROM A 



REPRESENTATIVE HUMAN SUBJECT 



Plate VI 

 Fig. 9. Film prepared immediately preceding the administration of B. 

 acidophilus milk. Note relatively large number of Gram-negative organ- 

 isms. X 1000. 



Plate VII 



Fig. 10. Film prepared four days after the beginning of B. acidophilus 

 milk feeding (1000 ec. daily). Note increase in the number of Gram- 

 positive acidophilus-like rods. X 1000. 



Plate VIII 



Fig. 11. Film prepared eight days after the initial feeding of B. 

 acidophilus milk (1000 cc. daily). Note great preponderance of Gram- 

 positive acidophilus-like rods. X 1000. 



