126 SWINE ERYSIPELAS 



3. Erysipelas without redness of the skin. 



4. Diffuse necrotic erysipelas of the skin. 



5. Endocarditis of erysipelas. 



He also maintains that there may sometimes be transi- 

 tional forms between the respective varieties which he enumer- 

 ates. Different forms of epizootic erysipelas have also been 

 described by Cornevin, Hess and others. 



§ 113, Morbid anatomy. In the ordinary form of epi- 

 zootic erysipelas there is a septicemic condition without any 

 well marked morbid changes of separate organs. In less acute 

 cases the septicemia may give way to hemorrhagic and diph- 

 theritic gastro-enteritis, considerable swelling of the lymphatic 

 system, hemorrhagic or parenchymatous nephritis, and 

 hepatitis, acute swelling of the spleen and myositis. The 

 hemorrhagic gastro-enteritis consists at first of excessive 

 inflammation of the mucous membrane of the stomach in the 

 region of the fundus. The mucosa shows a dark-red discolor- 

 ation which is partly diffuse and partly in spots. The cells 

 suffer from cloudy swelling and the mucous membrane is 

 covered with a viscid layer of mucus. The intestinal mucous 

 membrane is swollen, especially on the top of the folds and in 

 the neighborhood of Peyer's patches. It is infiltrated with 

 blood and sometimes shows superficial scabs. Less frequently, 

 circumscribed parts of the mucosa of the cecum and the anter- 

 ior parts of the colon suffer from a diphtheritic affection. 



The solitary follicles and Peyer's patches appear as prom- 

 inently raised patches. Sometimes they are infiltrated with 

 blood and surrounded by a reddish band. There is ulceration 

 and cicatrization of the solitary and agminated follicles. The 

 mesenteric glands become more swollen than the other glands 

 of the body, of a dark red color, and show softening. The 

 surface of fresh sections is dun-colored with interspersed dark- 

 red areas. The paraglandular tissue is hyperemic and infil- 

 trated with blood. 



The kidneys are enlarged, the cortex of a grayish-red and 



