ACVTE LARYNGEAL CATARRH. 117 



that affect the mucous membrane of the larynx, such as smoke, 

 dust, etc. It may result frona constant barking, as when an ani- 

 mal is taken to a show and barks constantly, or lying near a fire 

 and getting very warm, and then going and lying at the door, when 

 the draft will come on the head and throat. Laryngitis appears 

 as a secondary symptom of acute inflammation of the nose, throat, 

 and large bronchials, and it is generally present in distemper. 



Pathological Anatomy. The mucous membrane of the 

 larynx is reddened and inflamed, swollen, and covered with mucus 

 over its entire surface ; in some cases the membrane is eroded or 

 ecchymosed. 



Clinical Symptoms. The first symptom is a cough; this may 

 be very violent, according to the condition; it is always coarse, 

 hard, and dry in the beginning ; later it becomes softer and more 

 moist as it is accompanied with the secretions of mucus. 



By a slight pressure on the larynx we can make the animal 

 cough, and it seems to be painful to manipulation; running, excite- 

 ment, drinking cold water, or the administration of medicines all 

 produce coughing. Difficulty in respiration is seen in certain forms 

 of laryngitis where there are intense inflammation and great swell- 

 ing of the mucous membrane; it is also accompanied by more or 

 less wheezy or rattling sounds, which can be heard by placing the 

 ear on the larynx. There is not much constitutional disturbance 

 in this disease; the animal is depressed and eats slowly; this is 

 probably caused by a certain amount of the irritation extending 

 to the muscles of deglutition and swelling of the mucous mem- 

 brane, or from some form of pharyngitis which may be present at 

 the same time; if so, it is generally accompanied by a slight rise of 

 temperature. 



The disease generally lasts only a few days, although we find 

 some cases that do not respond to treatment, and they are apt to 

 remain irritable and become chronic. 



Therapeutics. The first thing to do is to remove the animal 

 from cold or draughts and friction with some mild liniment over 

 the larynx; also the application of a moist warm compress over 

 the larynx and the inhalation of medicated warm water, such as 

 chlorate of potassium, 0.50 ; water, 20.0 ; or Listerine diluted one- 

 half with water, from an atomizer, and internally the administra- 

 tion of some calmative or narcotic ; of the latter, morphine is the 



