Tuberculosis in Live Stock. 
13 
of the throat, udder, and point of the 
shoulder often present an abnormal 
condition, such as an enlargement or 
hardening, as shown in figure 4. Ani¬ 
mals affected with tuberculosis in ad¬ 
vanced stages often show a “ staring” 
coat and a generally unthrifty con¬ 
dition. When the throat glands of an 
animal arc affected, it often holds its 
head in an abnormal position in order 
to relieve the pressure which causes 
difficult breathing. Increased respira¬ 
tion is often noted when the lungs or 
lymphatic glands of the thoracic cav¬ 
ity arc affected. When some of the 
glands of that cavity are extensively 
diseased, the animal often develops 
bloat (fig. 5). Diarrhea is often evi¬ 
dent in some cases in which infection 
has extended to the abdominal cavity. 
The symptoms mentioned, though typi¬ 
cal, must not always be expected when 
animals are tuberculous; animals that 
are extensively diseased are often in 
apparently perfect physical condition. 
Fig. 6 . — Part of a tuberculous udder 
showing well-developed lesions. 
Fig. 7.—Beef carcass showing tuberculous nodules on ribs. 
