viii CONTENTS 



PAGB 



CHARACTERS OF THE BACTERIAL FLORA OF CARNIVOROUS 



AND OF HERBIVOROUS ANIMALS .... 80 



Influence of Food on Human Bacterial Flora of the Digest- 

 ive Tract 86 



The Reducing Action of Meat 89 



The Influence of the Epithelial Cells Lining the Digestive 



Tract 91 



The Permeability of the Mucous Membrane of the Intes- 

 tinal Tract for Bacteria 93 



Phylogenetic Significance of the Large Intestine . . 97 

 The Importance of Prompt Resorption from the Small 



Intestine 99 



The Phenomenon of Substitution 100 



The Presence of Pathogenic Bacteria in the Digestive 



Tract in Health 102 



CRITERIA EMPLOYED IN THE CLASSIFICATION OF BAC- 

 TERIA OF THE GASTRO-ENTERIC TRACT . . 105 



Methods of Investigation Ill 



Character of the Microscopical Fields .... Ill 

 The Dimethylamidobenzaldehyde Reaction of the 



Faeces 145 



The Dimethylamidobenzaldehyde Reaction of the 



Urine 147 



COMMON BACTERIAL INFECTIONS OF THE DIGESTIVE TRACT, 

 CONSIDERED FROM THE STANDPOINT OF THE 



MICROORGANISMS 150 



The Colon-typhoid-dysentery Group 150 



Colon Bacilli 150 



Typhoid Bacilli 157 



Paratyphoid and Allied Infections .... 167 



Dysentery Bacilli . 172 



Liquefying Bacteria 181 



Streptococcal and Staphylococcal Infections . . . 185 



Bacillus Bifidus 190 



Infections through Anaerobic Bacteria . . . .191 

 Bacillus Putrificus . . . . . . .192 



