84 SWINE PRACTICE 



inflammatory process thus extend into the peri-pharyngeal tissues. 

 Less frequently the balling gun is forcibly thurst into the pharyn- 

 geal cul-de-sac and the mucous membrane is lacerated or injured. 



The symptoms manifested in swine in which the cul-de-sac has 

 been injured direct by means of a balling gun or indirectly by the 

 deposit of a capsule, develop rapidly, being very evident within a 

 few hours. The affected animal coughs more or less continuously, 

 because of the irritation of the pharyngeal mucosa. If a capsule 

 be deposited into the cul-de-sac it will be very difficult for the 

 affected animal to remove it. It will cause labored breathing and 

 wheezing. Within 12 to 18 hours there will be marked swelling in 

 the cervical region. The animal by this time is usually unable to 

 swallow and dies apparently of asphyxiation. 



The lesion found in these cases will consist of inflammation of 

 varying intensity in the peripharyngeal tissue and if the tissues 

 are carefully dissected, the origin of the inflammatory process may 

 be traced to the pharyngeal cul-de-sac, where lacerations may be 

 found and where the evidence of the contents of the capsule can be 

 observed. 



PHARYNGITIS 



Inflammation of the pharyngeal mucosa is relatively common in 

 swine. This condition is frequently associated with laryngitis. 

 Pharyngitis is probably most common in the early spring and 

 especially in swine that are out in pasture where they have access 

 to cold water, , which is a common cause of the condition. It is 

 reported to be rela,tively common in mountainous sections, probably 

 because of the cold water in the mountain streams. 



Pharyngitis is not confined to swine of any particular age but 

 affects mature hogs,' feeders and little pigs. 



Three different types according to lesions of the pharyngitis have 

 been recognized in swine: catarrhal, phlegmonous and necrotic or 

 diphtheritic. 



Catarrhal pharyngitis is the most common type of inflammation, 

 and may be either acute or chronic. The usual cause of the disease 

 is improper food, cold water or undue exposure, although it may 

 be caused by infection. 



The mucous membrane of the pharynx affected with acute catarrh 

 is in the beginning dry and scarlet red. later becoming tumefied and 



