SECTION III 



DISEASES OF THE BRONCHI AND LUNGS 

 Bronchitis 



THIS affection is quite common ; it consists of 

 a catarrhal inflammation of the bronchial mu- 

 cous membrane, and occurs both in the acute and 

 chronic form, which see. 



Acute Bronchitis 



Acute bronchitis may be due to any of the fol- 

 lowing causes : Infection ; exposure to cold and 

 wet draughts when warm from exercise, or from 

 lying in front of a stove or fire; smoke, chemical 

 fumes (inhalation bronchitis), medicines going "the 

 wrong way," particles of food inspired when the 

 animal is insensible, parasites, ether anesthesia, and 

 as a complication of distemper. 



The average duration of an attack of acute bron- 

 chitis is from two to three weeks." 



Symptoms. — This disease is ushered in with 

 shivering fits or rigors, and a rise of temperature 

 to 103 or 105 degrees Fahrenheit. The animal is 

 depressed and more or less indifferent to its sur- 

 roundings ; the bowels are costive ; the ui-ine highly 

 colored and scanty. Soon a cough appears, at first 

 dry and dull, but later, as the disease reaches the 

 second stage, moist and loose. The cough can be 

 quite easily excited by pressure on the thoracic walls 

 behind the shoulder or by slight pressure on the 

 trachea. At first only the large bronchi may be 



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