INFECTIOUS PHAEYNGITIS 25 



/ 

 Symptoms. The disease appears almost as a subacute 



affection. For one or two days before it becomes fully 

 established the animal has a cough. This cough is not 

 heard, however, except during or after drinking water 

 and eating grain. It may be so mild as to escape the 

 attention of the owner or attendant. In from one to 

 three days after the cough has set in the horse has some 

 difficulty with his deglutitory acts. While drinking, 

 some of the water returns through the nose; the animal 

 stops drinking after every few swallows and experiences 

 a paroxysm of coughing and spasmodic gulping. In the 

 beginning of the disease the amount of water that re- 

 turns through the nose is slight; later it appears as 

 though literally pumped through the nasal chambers with 

 each act of deglutition. 



In another day, or at most two, after the inability to 

 swallow water normally, the horse finds it impossible to 

 swallow grain. "While the appetite does not seem to be 

 entirely lacking, in fact remaining good throughout the 

 attack, in many cases the grain is refused. At times the 

 animal attempts to eat oats, but after the first mouthful 

 or two the attempt is again given up. Nearly all of these 

 subjects eat hay throughout the course of the disease. 

 AH boluses of hay are not swallowed, however. The 

 manger is soon strewn with boluses that have been mas- 

 ticated but again ejected on account of inability to 

 swallow. 



Here we have another good mark for differentiating 

 this disease from such cases of pharyngitis as occur from 

 an influenza infection. In pharyngitis resulting from 

 influenza the horse shows genuine anorexia ; he does not 

 eat because he has no appetite, no desire to eat. In the 

 disease we are discussing the horse would eat if he could; 

 his appetite is not gone. He makes repeated daily at- 

 tempts, but does not succeed in swallowing well on ac- 



