TABLE OF CONTENTS XI 



PART II. GENERAL BIOLOGY OF MICRO-ORGANISMS. 



CHAPTER VII. MORPHOLOGY AND CLASSIFICATION. 



Molds, 137 ; Yeasts, 140 ; Bacteria, 141 ; Trichobacteria, 141; Spherical bacteria, 142; 

 Cylindrical bacteria, 144; Spiral bacteria, 146; Structure of the lower bacteria, 

 147; Endospores, 149; Filterable viruses, 150; Protozoa, 150; Flagellates, 151; 

 Rhizopods, 154; Sporozoa, 155; Ciliates, 159; Outline classification of micro- 

 organisms, 160 ; Specific nomenclature, 160. 



CHAPTER VIII. PHYSIOLOGY or MICRO-ORGANISMS. 



Relations of morphology and physiology, 162 ; Conditions of physiological study, 163 ; 

 Environmental factors, 164; Moisture, 164; Organic food, 164; Inorganic salts 

 and chemical reaction, 165; Oxygen, 166; Temperature, 166; Microbic variation, 

 167; Products of microbic growth, 168; Physical effects, 168; Chemical effects, 

 168; Enzymes, 169; Toxins, 171; Relation of microbe and its environment, 171 ; 

 Morphological characters, 171; Physiological tests, 173; Descriptive chart of 

 the Society of American Bacteriologists, 173. 



CHAPTER IX. THE DISTRIBUTION or MICRO-ORGANISMS AND THEIR 

 RELATION TO SPECIAL HABITATS. 



General distribution, 174; Micro-organisms of the Soil, 175; Pathogenic soil 

 bacteria, 176; Micro-organisms of the air, 176; Micro-organisms of Water and 

 Ice, 178; Self-purification of water, 179; Storage of water, 180; Filtration, 180; 

 Disinfection of water, 182; Bacteriological examination of water, 182; Detec- 

 tion of intestinal bacteria, 186; Bacteriological examination of ice, 188; Micro- 

 organisms of food, 189; Milk, 189; Milk flora, 190; Pathogenic microbes in 

 milk, 192; Milk for infant feeding, 192; Other foods, 193. 



CHAPTER X. PARASITISM AND PATHOGENESIS. 



The parasitic relation, 194; Pathogenesis, 195; Rules of Koch, 195; Infectious 

 disease, 196; Possibility of infection, 196; Susceptibility and resistance, 196; 

 Number of invaders, 197; Modes of introduction, 197; Local susceptibility, 199; 

 Local and general infections, 199; Transmission of infection, 200; Healthy 

 carriers of infection, 201. 



CHAPTER XI. THE PATHOGENIC PROPERTY or MICRO-ORGANISMS. 



Adaptation to parasitism, 202 ; Virulence, 202 ; Microbic poisons, 203 ; Defensive 

 mechanisms, 204. 



