86 SWINE ERYSIPELAS 
as varieties of this disease but more generally considered as distinct 
maladies and known by different names are as follows: 
True erysipelas. 
Swine urticaria. 
Erysipelas without redness of the skin. 
Diffuse necrotic erysipelas of the skin. 
Endocarditis of erysipelas. 
He also maintains that there may sometimes be transitional forms 
between the respective varieties which he enumerates. Different 
forms of epizodtic erysipelas have also been described by Cornevin, 
Hess and others. 
The duration of the disease varies from 1 to 10 days. In ‘types of 
moderate severity it runs from 3 to 4 weeks. 
The prognosis is unfavorable. There is from 20 to 80 per cent. 
mortality. 
Morbid anatomy. In the ordinary form of epizodtic 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 diphtheritic gastro-enteritis, consider- 
able swelling of the lymphatic system, hemorrhagic or parenchyma- 
tous nephritis, and hepatitis, acute swelling of the spleen and myositis. 
The hemorrhagic gastro-enteritis consists at first of excessive inflam- 
mation of the mucous membrane of the stomach in the region of the 
fundus. The mucosa shows a dark-red discoloration 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 nieghborhood 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 anterior parts 
of the colon suffer from a diphtheritic affection. Ay 
The solitary follicles and Peyer’s patches appear as prominently 
raised patches. Sometimes they are infiltrated with blood and sur- 
rounded 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 infiltrated with blood. 
