Tuberculosis in Live Stock 
27 
Fig. 19— An accredited Shorthorn herd, North Dakota. 
All this means much work hut it must be done to prevent infection 
from spreading to the healthy animals. Proper sanitary conditions 
on premises where live stock are kept is of great importance in keep¬ 
ing the animals healthy and able to resist disease. Sanitation, in 
its broad sense, includes the admission of abundant sunlight and 
fresh air properly regulated. 
Fig. 20 .—An accredited Hereford herd, Kentucky. 
