NECROBACILLOSIS 229 
rise of temperature and finally die from absorption of the toxic 
products. 
Foot rot in sheep. Foot rot in sheep is a condition somewhat 
resembling the same disease in cattle and found to be caused by the 
same organism. The work of Mohler has shown that long thread- 
like bacilli which resemble B. necrophorus are constantly present 
and when brought into contact with the feet of healthy sheep 
produce lesions like those found in the cattle outbreaks. Whenever 
this occurs in the feet there is a progressive degeneration and destruc- 
tion of the tissue with a tendency to spread in every direction from 
the point of infection leaving behind a soft, dead, caseous mass as 
a result of its action upon the tissues. As in cattle, the sheep are 
lame, fistulous tracts extend under the horny layer as well as in the 
deeper tissue of the leg, sometimes causing necrosis of the tendons and 
ligaments. The prognosis is favorable when promptly treated with 
disinfectants. This may be differentiated from suppurative lesions 
due to infection with pyogenic bacteria. 
Necrotic quittor. A number of observations have been made by 
Eberlein, Fréhner, Jensen, M’Fadyean and others that frequently 
serious consequences follow apparently very slight injuries, as a nail 
prick in the foot, due to infection with B. necrophorus. The first 
manifestations are an inflammation of the tissues which results in a 
hot, painful swelling of the coronet over the infected quarter and 
marked lameness. Finally the sinuses are formed which discharge a 
sanious fetid fluid and which connect with the necrotic cartilage. 
In other animals the necrosis of cartilage such as that of the larynx 
and nasal septum are attacked and destroyed by this organism. Even 
bone tissue has been found to yield to the action of this organism. 
Usually pyogenic streptococci and micrococci are associated with 
B. necrophorus. 
Lip-and-leg ulceration of sheep. In 1910, Mohler described lip- 
and-leg ulceration which existed in sheep in various sections in the 
West. He reviews somewhat at length the literature on this subject. 
He points out that the lesion may occur anywhere on the exterior of 
the body where the bacillus may gain entrance but cuts, bruises and 
other injuries occur less frequently on parts covered with wool than 
they do about the mouth and lower limbs. The lesions occur, there- 
fore, either on the lips or legs or both. In these necrotic areas Mohler 
found B. necrophorus. The infection is transmitted from one sheep to 
