134 BEEF PRODUCTION 



mouth are made, which serve as channels of entrance 

 for the fungus. It may also be introduced in other 

 ways, as decayed teeth or the shedding of milk teeth. 



Although the matter has received quite a good deal 

 of attention, not much has been done in the way of 

 prevention. The disease does not spread directly from 

 one animal to another, but when the tumors reach their 

 growth they break open on the outside and discharge 

 a yellowish substance which is full of the ray fungi. 

 An animal with such a discharging abscess would, of 

 course, infect food in mangers, feed troughs, and grass 

 in the pasture and thus offer an excellent opportunity 

 for infection of other animals. Animals with discharging 

 abscesses should be killed or confined away from other 

 animals. Pastures in which cases of lump-jaw seem 

 to develop rather commonly should be placed under 

 cultivation. 



The two most common methods of cure are (1) to cut 

 out the tumor, and (2) the iodide of potassium treatment. 

 The cutting method is very effective in the early stages 

 of development, but should be undertaken only by a 

 trained veterinarian on account of the proximity to 

 large blood vessels. Dr. M. H. Reynolds, B. S. A., D. 

 V. M., M. D., professor of veterinary medicine, Univer- 

 sity of Minnesota, outlines the potassium iodide method 

 as follows: 



Give by means of the mouth, either as a drench or 

 dissolved in the drinking water. The daily dose is 

 about one-fourth dram per hundred pounds live weight. 

 "This dose is given daily until the animal seems to get 

 off feed and discharges freely from the eyes and nose, 

 indicating something of a catarrhal disturbance of these 

 mucous membranes. These conditions indicate that 

 the treatment should be discontinued for three or four 

 days. During this period a mild cathartic of epsom 

 salts should be given, about one pound to 1000 pounds 

 live weight. This should be dissolved in water and 

 given as a drench. The iodide treatment may then be 



