PRINCIPLES OF VETERINARY SURGERY 379 



Moller has observed a typical case in the dog. Frohner, 

 out of 70,000 sick dogs, has met the disease four times. 



In the hog, erysipelas exists in a popular form, and the 

 disease can be transmitted to other animals of the same 

 species. (Frohner). 



PATHOLOGICAL ANATOMY.— In the regions in- 

 vaded, the skin is thick with infiltration, and the subcutan- 

 eous connective tissue contains a coagulum that creeps be- 

 tween the subjacent muscles. The mucous membranes are 

 cadaverous and covered with hsemorrhagic exudation, the 

 lymphatic glands are hypertrophied and dark, and the par- 

 enchymatous organs are engorged and hsemorrhagic. The 

 pleura, peritoneum and pericardium contain a muddy red 

 serum and are strewn with reddish striae and partially cov- 

 ered with petechial spots, which likewise affect the mesen- 

 tery and mesenteric glands. The lungs and intestines are 

 normal, the liver is attacked with fatty degeneration and the 

 spleen is engorged with blood. The pulp of the spleen and 

 liver and the blood contain streptococci in variable numbers. 

 Microscopic examination of the diseased integument shows 

 the connective tissue fibers dissociated by infiltration and the 

 lymphatic vessels distended and filled with leucocytes. The 

 specimens sometimes contain streptococci in considerable 

 quantities. These descriptions of these lesions will also 

 apply to the ox. 



DIAGNOSIS. — The recognition of the disease seems al- 

 ways easy. The location of the swelling, its character and 

 its rapid development are the important items, which with 

 the general symptoms and the proof of the existence of the 

 streptococcus ( ?) make the diagnosis certain. 



PROGNOSIS. — If the published observations are true 

 the disease is a serious one in the horse. Lucet's case died 

 in forty-eight hours, Malzew's succumbed in a short time 

 and none of Semmer's three survived. Death may also sup- 



