164 



SUMMER DIARRHCEA 



TABLE 18 — {continued). 



A = Acid. 



A + G -Acid and Gas. 

 * = Described Sub-group. 



(3 = No change. 



" It is obvious that eaclr sub-group may be further divided into 20 possible varieties 

 according to the reactions of the milk cultures, the formation or non-formation of 

 indol, and the presence or absence of motility. The method adopted for differentiating 

 the varieties, according to numbers which always indicate the same reactions, is given 

 in 'ral)Ie 19. 



