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 coU and allied organisms : 



