TUBEKCULOSIS. 329 



any expectoration or discharge from the lungs. The digestive 

 organs are weak, the rumen prone to tympanites, and diarrhoea 

 sets in, which soon renders the animal a mere bag of bones. 

 Auscultation and percussion may find the lungs and contents of 

 the thorax diseased or otherwise. There is generally some 

 degree of pain and tenderness evinced by the animal when the 

 sides are sharply struck or pressed upon, and very often a friction 

 (pleural) sound is heard, and pressure upon the loins will cause 

 the animal to cringe, groan, or otherwise evince pain. 



As the disease advances the cough becomes more trouble- 

 some, — paroxysmal ; louder than that of pleuro-pneumonia, and 

 occasionally bronchial discharges may issue from the mouth after 

 a severe fit of coughing. As already stated, in this yellow, 

 grumous, and viscid material the bacilli may be detected by 

 microscopic examination. It, however, most frequently happens 

 that the severest fit of coughing brings about no discharge, the 

 material being swallowed. This also occurs in pulmonary 

 glanders in the horse, in which abscesses may be found on 2'^ost 

 mortem.' examination filled with pus, freely communicating with 

 the bronchi, from which during life no discharge has reached 

 the nostrils, having been swallowed, as may be observed by 

 watching the animal. It can be seen by standing at the left 

 side that the act of swallowing is performed, and the course of 

 the material followed by the eye during its course from the 

 pharynx into the chest. 



The animal rapidly becomes more or less hidebound, the 

 hair dull, the expression dejected, the eyes watery and 

 sunken, and the lids often covered with a scaly material, whilst 

 a fcetid discharge may issue from the nostrils. The respira- 

 tions, as the disease advances, become greatly accelerated, 

 short and jerky, each expiration being often associated with a 

 moaning or grunting sound ; the prostration is extreme, and the 

 animal soon succumbs.. 



On percussing the walls of the chest the animal evinces some 

 signs of pain, and a cough is often excited ; there is decreased 

 resonance and often signs of lung consolidations and of pleural 

 change, whilst auscultation may reveal increased tubular 

 sounds with diminished or absence of the vesicular murmurs, 

 and often signs of consolidation. There may also be pronounced 

 bronchial rales when the discharges have invaded the bronchi, 

 and friction sounds when the pleural surfaces are roughened by 



