20O TUBERCULOSIS IN SWINE 



last several months, but death supervenes rapidly if the lesions 

 become generalized by the scattering of the bacteria through 

 the blood stream. Primary pulmonary tuberculosis is very 

 rare but sooner or later lung lesions complicate abdominal 

 tuberculosis. They betray themselves at the outset by a short, 

 dry, abortive cough and by difficult respiration. The cough 

 soon becomes paroxysmal and painful and is often followed by 

 vomiting ; the respiration becomes hurried and gradually pain- 

 ful and more difficult, wasting is very rapid, and death super- 

 venes in a few weeks. 



The scrofula of swine (glandular tuberculosis) usually 

 shows itself by a puffing up of the face, which a careful exam- 

 ination shows to be lifted up by the subjacent glands, these 

 being enlarged, indurated, still fairly mobile and free from 

 heat or tenderness. The retro-pharyngeal, superior cervical 

 and sublingual glands are usually affected, forming a kind of 

 necklace of unequal and knotty tumors, reaching from ear to 

 ear and becoming larger under the neck between the rami of 

 the lower jaw. Similar tumors may be developed at the 

 thoracic inlet, behind the shoulder or in the groin, which, as 

 they increase in size, become harder and more adherent to the 

 neighboring tissues. Sometimes, however, a slight fluctua- 

 tion is perceptible. The tumor may suppurate and discharge 

 a small quantity of a thick and grumous pus, but the glandu- 

 lar tumor does not disappear and the opening into the abscess 

 remains for a long time as a fi.stula. 



There may be swellings of the bones, causing a true 

 tuberculous arthritis when the lesions happen to be situated 

 at the level of an epiphysis. Persistent lameness, fistulous 

 wounds suppurating indefinitely, necrosis and caries, are the 

 complications of the lesions of the bone, the development of 

 which is always extremely slow. 



§ 146. Morbid anatomy. The manifestations of tu- 

 berculosis in swine are exceedingly interesting. Nocard 

 found the lesions to consist of miliary granulations which 

 rapidly become caseous, as in cattle, but which more rarely 



