CHAPTER XV 



BACTERIAL DISEASES AFFECTING THE 

 CIRCULATORY SYSTEM 



Disease. Cause. 



Septicaemia Streptococcus septus, staphylococci, pneumo- 



cocci, B. coli. 

 Pyseruia Streptococcus septus, staphylococci, pneumo- 



cocci, B. coli. 

 Malignant cedema ... Bacillus of malignant cedema. 



Quarter-evil Bacillus of quarter-evil. 



Anthrax Bacillus of anthrax. 



Septicaemia. 



The diseases under this heading are more commonly seen 

 in veterinary practice than in human medicine, and the 

 reason is not far to seek. The predisposing causes to all 

 septicemias, speaking generally, are neglect and unhealthy 

 surroundings. 



Septicaemia appears as two distinct conditions — i.e., (1) 

 septic infection, when the blood itself is charged with 

 living bacteria. If such blood is injected into the circu- 

 lation of a healthy animal a similar disease will be produced 

 in that animal ; and (2) septic intoxication, when the blood 

 is charged with poisons emanating from bacteria located in 

 some centre in the body. If such blood is injected into a 

 healthy animal, no reproduction of that disease takes place, 

 thereby distinguishing septic infection from septic intoxica- 

 tion. Although we, therefore, recognize in practice these 

 two conditions as separate ones, the clinician should always 

 remember that an intoxication may become an infection 



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