58 SWINE PLAGUE 



Disease of the digestive tract in a considerable proportion 

 of animals inoculated with swine-plague cultures consisted 

 ina severe catarrhal inflammation of the lining membrane 

 of the stomach. The hypersemia was very intense, border- 

 ing on hemorrhage. Occasionally the extension of the peri- 

 tonitis, produced b}^ intra-abdominal inoculation, along the 

 mesentery causes a severe inflammation with exudation on the 

 mucosa of the small intestine. A case is reported where all 

 the Peyer's patches of the small intestine were in a hyper- 

 amic, and partly hemorrhagic condition. 



Fig. 9. Hemorj-hage into interlobular tissue of a swine-plague lung. 

 — {a) Hemorrhage, (6) hepatized lobules 



In the naturally contracted disease extensive hyperaemia 

 of the mucosa of the large intestine bordering on a hemorrhagic 

 condition has been observed. In other cases a peculiar croup- 

 ous exudation appeared, which seemingly resulted from the 

 effect of swine-plague bacteria in the large intestine. 



The production of intestinal disease by swine-plague bac- 

 teria may be supposed to go on as follows. The bacteria first 

 attack the lung tissue and there produce more or less hepatiza- 

 tion. The blood through the lungs finds its path partly ob- 

 structed. This reacts on the blood in the right side of the 

 heart and the venous blood entering it. Hence there may be 



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