14 CANINE MEDICINE' AND SURGERY 



of atropin sulphate should be injected hypo- 

 dermically. 



Laryngitis 



The most common cause of laryngitis is cold. 

 The usual way the animal becomes affected is by 

 lying near a hot stove or a fire until he is too warm, 

 and then lying by a door where a cold draught 

 strikes the neck. Constant barking, a habit of dogs 

 when away from home, is another prolific cause. 

 External injuries to the larynx, caused by the dog 

 straining at the leash or the jerk-line being applied 

 too vigorously by the dog trainer while training 

 animals to the gun, are likewise considered among 

 causative factors. 



Laryngitis may also appear as a complication in 

 distemper or in bronchitis. 



Symptoms. — A cough is the first symptom of 

 laryngitis. This may be quite violent, and at first 

 is hard, harsh and dry. When exudation takes place 

 the cough becomes moister and softer. Auscultation 

 over the larynx reveals wheezing or rattling sounds ; 

 manipulation of the larynx is painful, producing an 

 attack of coughing. The cough is also easily excited 

 and aggravated by running, eating, drinking and by 

 the administration of drugs. In severe cases, where 

 the mucous membrane is much swollen, there is a 

 well-marked difficulty in respiration ; the tempera- 

 ture runs high, to 104 or 105 degrees Fahrenheit, 

 and the appetite is impaired. 



The average duration of an uncomplicated attack 

 of laryngitis is about four days, when, if not relieved, 

 it may run on into the chronic form, or sudden death 

 may occur from edema of the glottis. 



Treatment. — The animal must be immediately 

 placed in warm and comfortable quarters, and an 

 abundance of cold water provided and kept con- 



