154 TUBERCULOSIS 
there is sometimes a discharge of thick, yellowish material mixed 
with mucus. In tuberculosis of the testicles the organs become en- 
larged and hard. 
In all advanced cases, the nutrition of the animal is interfered 
with and, sooner or later, the “tuberculous cachexia” appears. It is, 
however, in many cases re- 
markable to note the extent 
of lesions in animals that are 
well nourished and present 
no external signs of disease. 
Animals killed in prime con- 
dition by the butcher are 
sometimes found to contain 
extensive and widely dis- 
tributed lesions of tubercu- 
losis. In generalized tuber- 
culosis, many of the symp- 
toms described above may 
occur simultaneously. The 
symptoms of acute miliary 
tuberculosis are rapid loss of 
flesh, depression, poor appe- 
tite, cough, weakness, rapid 
breathing, harsh respiratory 
Fic. 29. 
DORSAL ASPECT OF BOVINE LUNGS SHOW- 
ING POSITION OF THE POSTERIOR MEDIASTINAL 
GLANDS; (a, b, e, c’) CAUDAL, VENTRAL, CEPHALIC 
LOBEs, (f) ESOPHAGUS, (g) MUSCULAR PILLARS OF 
DIAPHRAGM, (h) POSTERIOR AORTA, (i) CAUDAL 
MARGIN OF THE LIGAMENT OF THE LUNG. A. LEFT 
BRONCHIAL GLAND. MEDIASTINAL GLANDS ARE 
SHOWN, MOST OF THEM RESTING ON THE ESOPHA- 
GUS. THE LARGE CAUDAL GLAND RESTING ON THE 
PILLARS OF THE DIAPHRAGM IS MOST FREQUENTLY 
DISEASED AND OFTEN ATTAINS AN ENORMOUS SIZE. 
THE REMAINING MEDIASTINAL GLANDS ARE 
ARRANGED IN TWO SETS ON THE RIGHT AND LEFT 
MARGINS OF THE ESOPHAGUS (Smith). 
charged into the blood or lymph currents. 
sounds, some elevation in 
temperature, increased 
pulse rate and, sometimes, 
enlarged lymphatic glands. 
The course of this form of 
tuberculosis is always rapid 
and. terminates in death. 
Acute miliary tuberculosis 
occurs when large numbers 
of tubercle bacteria are dis- 
They are then carried 
to other parts of the body, filtered out in the capillaries of the lungs, 
liver, spleen, kidneys and elsewhere, causing tubercular lesions in 
each of these localities. The lesion from which the infectious 
material entered the circulation may have been a comparatively 
small nodule. This form of the disease is more likely to appear in 
