CHAPTER VII 



SIGNIFICANCE OF THE PRESENCE OF THE COLON GROUP 

 IN WATER 



Colon Bacilli in the Intestines of the Lower Animals. 



The Bacillus coli is by no means confined to the human 

 intestine. Dyar and Keith (Dyar and Keith, 1893) found 

 it to be the prevaiHng intestinal form in the cat, dog, hog, 

 and cow. About the same time, Fremlin (Fremlin, 1893) 

 found colon bacilli in the faeces of dogs, mice, and rab- 

 bits, but not in those of rats, guinea pigs, and pigeons. 

 Smith (Smith, 1895) recorded the presence of the 

 organism, in almost pure cultures, in the intestines of 

 dogs, cats, swine, and cattle; and he also found it in 

 the organs of fowls and turkeys after death. Brotzu 

 (Brotzu, 1895) reported B. coli and allied forms as very 

 abundant in the intestine of the dog; and Belitzer 

 (!^Belitzer, 1899) isolated typical colon bacilli from the 

 intestinal contents of horses, cattle, swine, and goats. 

 Moore and Wright (Moore and Wright, 1900) recorded 

 the finding of the colon bacillus in the horse, cow, 

 dog, sheep, and hen; and in a later report (Moore 

 and Wright, 1902) they noted its occurrence in swine and 

 in some, but not all, the specimens of rabbits examined. 

 In frogs it was not found. Eyre (1904) has more 

 recently isolated typical B. coli from the intestines 



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