CONTENTS. 



Introduction: Historical and Developmental 



Data . 1-12 



PART ONE PRINCIPLES OF INFECTION. 



CHAPTER I. 

 Parasitism, Infectiousness, Contagiousness 13- 21 



CHAPTER II. 

 Infectious Etiology 22- 32 



CHAPTER III. 



Infection Atria and the Excretion of Micro- 

 organisms 33- 40 



CHAPTER IV. 

 Sources of Pathogenic Micro -Organisms : 



1. Earth, Etc 41-42 



2. Food Substances 42-43 



3. Animals 43- 45 



4. Body Surfaces of the Individual 45-46 



CHAPTER V. 



Sources of Pathogenic Micro-Organisms (con- 

 tinued) : 



5. From Man to Man 47- 63 



CHAPTER VI. 



Sources of Pathogenic Micro-Organisms (con- 

 cluded) : 



6. Dissemination and Transmission by 



Insects : 



A. Dissemination 64-07 



B. Transmission . . 67- 87 



