Anatomical Changes. 241 



The intestinal canal contains dirty-gray or from the admix- 

 ture of blood, darkish-brown, very liquid feces which have a 

 sweetish stale odor and are often mixed with membranous 

 shreds. _ The mucous membrane is much reddened, the subjacent 

 connective tissue gelatinously swollen. The mucous membrane 

 of the duodenum and of the jejunum shows plate-like deposits 

 similar to those in the abomasum, and occasionally they are also 

 found in the ileum. The solitary follicles are swollen to the 

 size of a hemp seed or even larger, and form small nodules 

 from which a purulent or yellow caseous mass may be squeezed. 

 (If the necrotic epithelial cells are not thrown off, they together 

 with the swollen glands cause the mucous membrane to resemble 

 the skin of a boiled eel.) The Peyer's patches are at first uni- 

 formly swollen, and rise with a flat prominence over the sur- 

 rounding tissue ; later small dirty-gray deposits appear around 

 them, which subsequently confluate to a dry, caseous and strongly 

 adherent or a mush-like, soft deposit, several millimeters in 

 extent. In rare cases the epithelial layer forms with the coagu- 

 lated exudate a membranous cylinder several millimeters thick 

 on the inner surface of the intestinal tube; in other cases the 

 necrotic tissue of the mucous membrane changes into a friable, 

 dry, caseous mass, when after its removal the smooth muscular 

 layer is exposed. 



The large intestines show similar changes, but in these the 

 lesions are less pronounced than in the small intestines. Fre- 

 quently they show only indications of a simple acute catarrh, 

 or the mucous membrane appears as if sprinkled with bran 

 because of the superficial necrosis of the epithelial layer. Some- 

 times the mucous membrane of the large and small intestines 

 presents broad, bright-red transverse stripes or extravasations 

 of blood so that it greatly resembles the skin of a zebra 

 (Verney). 



In the bright-red air passages^ punctiform or linear hemor- 

 rhages and catarrhal swelling of the mucous membrane, as well 

 as edematous infiltration of the submucous connective tissue, 

 especially in the nose and in the larynx, are almost constant 

 lesions. There are frequently croupous, pseudo-membranous 

 deposits in the nose, and especially on the nostrils, also in the 

 larynx and in the trachea, under which ulcerative erosions are 

 found. The mucous membrane of the bronchi usually manifests 

 only a ring-form deposit, and is covered with a purulent secre- 

 tion, which may in places entirely fill the small bronchi and 

 pop out on the cut surface on slight pressure in the form of 

 white plugs. 



Similar changes may frequently be observed on the mucous 

 membrane of the female genital organs, and especially in the 

 anterior part of the vagina, while further back the lesions are 

 usually less marked. 



The liver shows parenchymatous or fatty degeneration. 

 The gall bladder is distended and contains thin, green or yellow, 



