286 MILK HYGIENE 



twenty-eight possessed clinical histories indicating that in them 

 the bacillus was introduced through the alimentary canal. Of 

 these, thirteen belong to Group I. Of the nine cases in which 

 cervical glands were studied by us three, and of the nineteen 

 cases in which the lesions of abdominal tuberculosis were 

 studied by us, ten belong to Group I. 



' ' These facts indicate that a very large proportion of tuber- 

 culosis contracted by ingestion is due to tubercle bacilli of 

 bovine source. 



" A very considerable amount of disease and loss of Ufe, 

 especially among the young, must he attributed to the consump- 

 tion of cows' milk containing tubercle bacilli. The presence 

 of tubercle bacilli in cows' milk can be detected, though with 

 some difficulty, if the proper means be adopted, and such ought 

 never to be used as food. There is far less difficulty in recog- 

 nizing clinically that a cow is distinctly suffering from tuber- 

 culosis, in which case she may be yielding tuberculosis milk. 

 The milk coming from such a cow ought not to form part 

 of human food, and indeed ought not to be used as food at all. 



" Our results clearly point to the necessity of measures 

 more stringent than those at present enforced being taken 

 to prevent the sale or the consumption of such milk." 



