CONTENTS xi 



CHAPTER VII 



PAGE 



TUBERCULOSIS OP THE Cow IN EELATION TO HUMAN DISEASE . 125 



The prevalence of bovine tuberculosis Tuberculous cows and the 

 secretion of tubercle bacilli Prevalence of cows with udder tuber- 

 culosis Udder tuberculosis and tubercle bacilli in the milk The 

 detection of bovine tuberculosis : clinical diagnosis, bacteriological 

 examination, use of tuberculin Sources of error in tuberculin 

 diagnosis Methods of spread of bovine tuberculosis Prevalence of 

 tubercle bacilli in milk, in butter, in cheese Bovine tuberculosis 

 as a cause of human disease Human and bovine types of tubercle 

 bacilli Comparative prevalence of these types in the human subject 

 Comparative prevalence of abdominal tuberculosis in Great Britain 

 and Germany Paths of infection in tuberculosis. 



CHAPTER VIII 

 MILK AND CHILD MORTALITY . . ... .153 



The general relationship of milk to child mortality The infantile 

 mortality rate Epidemic diarrhoea : general epidemiological 

 features, relationship to hand-feeding, special relationship to milk, 

 the place of specific infection Comparative investigations upon the 

 relationship of cows' milk to infant mortality The evidence of the 

 pure milk institutions : French, English, American. 



PART II 

 THE BACTERIOLOGICAL EXAMINATION OF MILK 



CHAPTER IX 



GENERAL PARTICULARS AND PRELIMINARY PROCEDURE . .171 



Objects of a bacteriological examination of milk Collection of 

 samples Particulars to record Dilution of the sample. 



CHAPTER X 



BACTERIAL ESTIMATIONS TO DETERMINE THE GENERAL CON- 

 TAMINATION OF MILK . . . . . . .177 



Estimation of the number of bacteria : media, temperature of 

 incubation, reaction of medium, exact procedure, dilutions to 

 employ, 'direct enumeration from the centrifugalised deposit 



