CONTENTS 

 PART I 



THE BACTEEIOLOGY OF MILK: MILK AND 

 HUMAN DISEASE 



CHAPTER I 



PAGE 



THE CHEMICAL AND CELLULAR CONTENT OF Cows' MILK . . 3 



The chemical composition of milk Milk enzymes The inter- 

 relationship of the chemical constituents Factors influencing the 

 fat and solids not fat in milk Physiology of milk secretion 

 Histology of the mammary gland Varieties of cellular elements 

 found in milk Factors influencing the cellular content of milk 

 Milk sediments Factors influencing the amount of sediment 

 Sources of the sediment in milk. 



CHAPTER II 



THE SOURCES OP BACTERIA IN MILK . . . . . 17 



General summary of the sources of bacteria in milk Intra-mammary 

 contamination Sources and method of entry of intra-mammary 

 bacteria The milking operation as a source of bacteria in milk 

 Manurial contamination Influence of cleanliness of the udder 

 Comparison between clean and dirty milkers Bacteria introduced 

 from milk vessels Bacteria added from milk strainers, coolers, and 

 separators Contamination in transit Bacteria added on purveyors' 

 and consumers' premises Flies and milk pollution. 



CHAPTER III 



THE BACTERIA FOUND IN MILK . . . . . . 27 



"Milk bacteria" Streptococci: sources, significance, varieties, 

 virulence Staphylococci Bacillus coli and allied organisms : 



