106 DISEASES OF 



BRONCHITIS AND PNEUMONIA LUNG FEVER 

 -INFLAMMATION OF LUNGS- 



ALTHOUGH for the professional veterinarian these two 

 diseases should be studied apart and their individuality 

 be kept distinct, the ordinary, every-day stock owner 

 would be simply baffled should an attempt be made to 

 distinguish them in a book of this description. For the 

 convenience of the stockman I shall therefore consider 

 them as one. 



Bronchitis is an inflammation of the air tubes that 

 ramify all through the lungs. Pneumonia is an inflam- 

 mation of the structures of the lungs that lie outside of 

 the bronchial tubes. But the two diseases very fre- 

 quently exist together, and we find in most cases that 

 the tubes and other structures of the lungs are all 

 considerably involved in the diseased process. 



Causes. The most common is exposure to cold damp 

 weather or drafts, especially when a long coat is satu- 

 rated with perspiration. Consequently in the fall before 

 horses are clipped, these diseases are always more or less 

 common. It is sometimes caused by small, thread-like 

 worms (filaria) in the windpipe or trachea. Calves and 

 lambs are particularly subject to the disease from this 

 cause in some localities. I have seen many cases of 

 bronchitis follow careless drenchings (giving liquid med- 

 icines). 



Symptoms. Usually the first thing noticed is that 

 the animal seems disinclined to move around freely or 

 it may seem to lag in its work. The attendant will no- 

 tice that it does not look as well as usual. After being 



