Necrotic Stomatitis. 
J 7 
tis to Jie typical lesions of hog cholera were present in the same 
herd and at the same time. This problem of the relation existing 
between these two diseases, the Veterinary Division of the Experi¬ 
ment Station has set itself to work out. In the meantime we can 
only say that there are two very serious and menacing diseases of 
hogs in our state, that one of them is necrotic stomatitis and the 
other is cholera, either of which is to be found uncontaminated by 
the other, but that in a considerable number of cases the bacillus 
necrophorous acting as a secondary invader in hogs already ill with 
cholera, becomes so virulent and produces such extensive lesions 
as to almost obscure the original disease. 
Since 1909 the disease has not attained its former"virulence 
but during this time there has been more cholera than ever. It is to 
be remembered, however, that if the proper conditions arise this 
may at any time again become a very serious disease. 
Symptoms. 
From our experience in Colorado we must describe the symp¬ 
toms of this disease somewhat differently from the orthodox view. 
While it most commonly attacks the young pigs, particularly suck¬ 
lings, it has by no means confined itself to these animals, spreading 
rapidly through the herd and killing many old hogs. The young 
pigs are usually attacked first and with them the fatality was much 
greater, but the old animals died in great numbers. 
The ulcers frequently started in the mouth, but the bacteria 
seemed especially virulent so that extension was rapid. There was 
invasion of bone and loosening of teeth and even channels from the 
mouth to the nasal cavity or even to the exterior were not rare. In 
little pigs the toxemia was so great that death often resulted with 
no other lesions than those in the mouth, but in the older animals 
large cheesy ulcers, yellow, or yellowish brown in color, were to be 
found in the stomach and throughout the large intestines. These 
ulcers in the stomach were not uncommonly the size of the palm 
of a man’s hand. The cecum was frequently found to be lined 
with a solid membrane of this cheesy material, there being no dif¬ 
ferentiation between the margins of individual ulcers. Many of 
these animals showed deep cheesy ulcers on the skin, especially of 
the legs, and many of the males exhibited like masses of necrotic 
material within the sheath. These acute cases were always asso¬ 
ciated with a high fever. 
In the older hogs the disease sometimes took a chronic form. 
Frequently the ulceration of the jaw bones resulted in deformities 
of the face with sometimes such a twisting of one or both jaws that 
