Diseases of the Respiratory Or gam,. 85 



badly set on head, and such should be rejected for breed- 

 ing purposes. 



BEONCHITIS. 



Inflammation of the large air tubes within the lungs 

 It may be looked upon as an extension downward of nasal 

 catarrh or sore-throat and frequently supervenes on one 

 or the other of these. Otherwise it owns the same gen- 

 eral causes with these affections. It may also attend on 

 influenza, strangles, contagious pleuro-pneumonia, dis- 

 temper in dogs, tuberculosis, and parasitic diseases 6i the 

 lungs. 



Symptoms. In mild cases there are dullness, impaired ap- 

 petite, hot dry mouth, red membrane of nose, accelerated 

 pulse and breathing, and a cough at first hard but becom- 

 ing soft and rattling as discharge is established from the 

 nose. Such may recover in a few days without treatment. 



In severe cases there is dullness, inappetence, hot dry 

 mouth, increased temperature, rapid pulse, labored breath- 

 ing with loud blowing sounds over the lower end of the 

 windpipe and behind the middle of the shoulder-blade. 

 The cough is dry, hard, sonorous and painful (barking), 

 often occurring in fits and seeming to come from the depth 

 of the chest. Percussion detects no change of resonance 

 at any part of the chest, as in pneumonia. The membrane 

 of the nose has a dark red or violet hue, varying in pro- 

 portion to the general implication of the bronchial tubes 

 and especially the smaller ones, and there is drowsiness 

 and drooping of the head in the same ratio. 



From the second to the fourth day a whitish discharge 

 sets in from the nose, the cough becomes soft and rattling, 

 the noise over the windpipe and behind the shoulder- 

 blade less harsh and blowing, but with a sHght rattle from 

 bursting bubbles, and the symptoms of fever abate. From 

 this time improvement dates, and recovery may be com- 

 plete in two or three weeks. 

 8 



