230 NECROBACILLOSIS 
another and also it has been found to pass from one species of animals 
to another. 
The disease can be prevented and in a large number of cases satis- 
factorily treated. The prevention consists first in the removal of the 
healthy animals; second, close examination of the exposed sheep; and 
third, thorough disinfection of corrals and sheds where the infected 
sheep have been kept. This is necessary as the necrosis bacilli retain 
their virulence under favorable conditions for a very long time. The 
treatment consists in a local application of disinfectants, several of 
which are reported to be efficient. These are the pure strength coal 
tar dip, peroxide of hydrogen, tincture of iodine, or better an applica- 
tion of mutton tallow or vaselin containing 5% of a recognized sheep 
dip when thoroughly rubbed into the necrotic area. 
Caseonecrosis of the digestive tract. Necrosis of circumscribed 
areas of the mucous membrane of the mouth, the esophagus and other 
parts of the digestive tract has been observed by a number of investi- 
gators and found to be due to B. necrophorus. Necrobacillosis in the 
intestines of calves and pigs has been described. Olt has described 
cases of such necrosis in the three stomachs. of the calf which by 
extension gave rise to a peritonitis. He has also found it in the first 
stomach of the deer and Jensen has described it in the antelope. 
Necrobacillosis of the colon of horses has also been described. The 
wide distribution of this organism makes it possible for lesions of this 
kind to occur in the digestive tract quite as readily as in lesions of the 
skin. . 
Necrotic stomatitis. This is an acute, specific, highly contagious 
inflammation of the mouth occurring enzodtically in many species of 
animals especially in calves, lambs and pigs. It is characterized by 
the formation of ulcers and caseonecrotic patches on the mucosa and 
general symptoms caused by the toxins elaborated by the necrosis 
bacillus. This form of stomatitis is frequently referred to as diph- 
theria, gangrenous stomatitis, malignant stomatitis, canker and 
ulcerative stomatitis. It is quite common in pigs. 
The period of incubation is said to be from three to five days. It 
has been found in very young animals. Local lesions are soon fol- 
lowed by general manifestations of intoxication. There is elevation 
of the temperature. Because of the soreness of the mouth the animals 
do not eat. The drooling from the mouth becomes profuse, swallow- 
ing difficult and even opening of the mouth is painful. An offensive 
