84 SWINE PLAGUE 



bacterium is easily obtained from the abdominal organs. In 

 brief, the lesions of swine plague as they appear in various 

 outbreaks may be summarized in four classes, namely : 



1. The acute septicemic form iu which the lesions are 

 characterized by a general hyperemic condition of the serous 

 membranes and parenchymatous organs. Not infrequently 

 hemorrhages, especially the punctiform variety, occur. No 

 localized lesions. 



2. Cases of pneumonia with or without pleuritis. The 

 other organs remained normal in appearance. 



3. Cases where either in addition to, or possibly in the 

 absence of, the lung lesions there are marked anatomical 

 changes in the mucosa of the digestive tract and possibly in 

 the lymphatic glands. 



4. Cases of mixed infection, especially with hog cholera, 

 where in addition to the swine-plague lesions which may be 

 more or less modified, there are those, especially of the diges- 

 tive tract, characteristic of the accompanying disease. 



In order to present as clear a picture as possible of the 

 findings in a case of this disease, the published autopsy notes 

 of one animal are appended. 



"Pig died yesterday, put on ice. Weight about 30 pounds. Skin 

 on ventral aspect of body more or less reddened ; over the sternum a 

 few excoriations. The enlarged inguinal glands show as lumps under 

 the skin. On section they present a mottled gray and red surface, the 

 red limited chiefly to the cortex. Edema of the subcutis over right 

 knee. 



" False membrane covers the left half of the mass of intestines and 

 the spleen ; consists of an elastic, rather firm yelVowish white layer. 

 Spleen firmly glued to the surrounding intestines, slightly enlarged, 

 dark, softened. Liver firm, cut with considerable difficulty. Kidneys 

 in condition of parenchymatous degeneration. One hemorrhagic spot 

 in medullary portion of the kidney. Pelvis contains a whitish glairy 

 liquid. 



" Digestive tract. Two superficial necroses on the inner surface of 

 lower lip in front, one on the upper lip and on edge of tongue near tip. 

 Stomach contains a little deeply bile-stained fluid. Mucosa sprinkled 

 with red spots of a washed-out appearance, most numerous in fundus 

 and near pyloric valve. Hyperemia of duodenum begins sharply at 



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