TABLE OF CONTENTS ix 



PART II. GENERAL BIOLOGY OF MICRO-ORGANISMS 

 Chapter VII. Morphology and Classification 



Molds and yeasts, 143 ; Bacteria, 147; Trichobacteria, 147; Spherical bacteria, 148; 

 Cylindrical bacteria, 150; Spiral bacterial, 152; Structure of the lower bacteria, 

 IS3; Endospores, 136; Filterable viruses, 156; Protozoa, 156; Flagellates, 157; 

 Rhizopods, 161; Sporozoa, 161; Ciliates, i66; Outline classification of micro- 

 organisms, 166 ; Specific nomenclature, 167. 



Chapter VIII. Physiology of Micro-organisms 



Relations of morphology and physiology, 169 ; Conditions of physiological study, 170 ; 

 Environmental factors, 171; Moisture, 171; Organic food, 171; Inorganic salts 

 and chemical reaction, 172; Oxygen, 173; Temperature, 173; Microbic variation, 

 r74; Products of microbic growth, 175; Physical effects, 175; Chemical effects, 

 i75;Enzymes, 176; Toxins, i78;Relation of microbe andits environment, 178; 

 Morphological characters, 178; Physiological tests, 180; Descriptive chart of 

 the Society of American Bacteriologists, 180. 



Chapter IX. The Distribution of Micro-organisms and their 

 Relation to Special Habitats 



General distribution, 181; Micro-organisms of the Soil, 182; Pathogenic soil 

 bacteria, 183; Micro-organisms of the air, 183 ; Micro-organisms of Water and 

 Ice, 185; Self -purification of water, 186; Storage of water, 187; Filtration, 187; 

 Disinfection of water, 189; Bacteriological examination of water, 189; Detec- 

 tion of intestinal bacteria, 193; Bacteriological examination of ice, 195; Micro- 

 organisms of food, 196; Milk, 196; Milk flora, 197; Pathogenic microbes in 

 milk, 199; Milk for infant feeding, 199; Other foods, 200. 



Chapter X. Parasitism and Pathogenesis 



The parasitic relation, 201; Pathogenesis, 202; Rules of Koch, 202; Infectious 

 disease, 203; Possibility of infection, 203; Susceptibility and resistance, 263; 

 Number of invaders, 204; Modes of introduction, 204; Local susceptibility, 206: 

 Local and general infections, 206; Transmission of infection, 207; Healthy 

 carriers of infection, 208. 



Chapter XI. The Pathogenic Property of Micro-organisms 



Adaptation to parasitism, 209; Virulence^ 209; Microbic poisons, 210; Defensive 

 mechanisms, 211. 



Chapter XII. Reaction of the Host to Infection 



Facts and theories, 213 ; Physiological hyperplasia, 213 ; Phagocytosis and encapsu- 

 lation, 214; Chemical constitution of the cell, 214; Antitoxins, 215; Cell re- 

 ceptor of first order, 216; Precipitins, 216; Receptor of second order, 217; 



