DIGESTIVE SYSTEM 85 



coated with epithelium and mucus, which occasionally desquamates, 

 leaving denuded areas. 



If the causative agent persists the condition becomes, chronic. 

 The chronic condition is evidenced by fibrous proliferation in the 

 submucosa resulting, first, in tumefaction, and then in protrusion 

 of the pharyngeal mucosa, which may, by contraction of the newly 

 formed fibrous tissues result in a corrugation of the mucous mem- 

 brane, or the newly formed fibrous tissues may be so extensive that 

 the pharyngeal mucosa becomes uniformly tumefied, dense and hard. 

 In either case the epithelium of the mucous membrane becomes 

 atrophied, leaving only a thin covering, usually of a squamous type 

 of epithelium. 



Phlegmonous pharyngitis is not infrequently associated with phleg- 

 monous stomatitis, although it may occur independently. Strepto- 

 cocci are the usual cause of phlegmonous pharyngitis, and the lesions 

 are practically identical with those of phlegmonous stomatitis. 



Necrotic pharyngitis is not rare in swine. It is the result of the 

 Bacillus necrophorus, and practically the same lesions are observed 

 as in necrobacillosis. 



The symptoms of pharyngitis are as follows: Cough, which in 

 the beginning is dry, but later becomes moist and is always painful. 

 Deglutition is painful and the affected animals prefer soft foods 

 or slops. In severe eases there is anorexia. There will be some 

 drooling and the escaping saliva will be stringy. There is retching 

 and frequently vomiting. There is usually one to three degrees F. 

 rise in temperature in the phlegmonous and necrotic types. 



The first step in the relief of pharyngitis is to remove the cause. 

 The affected animal or animals should be placed in clean comfort- 

 able quarters. If the affected animals will eat or drink, then it may 

 be possible to medicate them in the feed or water, giving mild 

 astringents. In valuable individuals it is advisable to give medica- 

 ments by inhalation in the form of vapors, using such agents as oil 

 of eucalyptus. 



PARALYSIS 



Paralysis of the pharynx is a condition resulting from disturb- 

 ances of the controlling pharyngeal nerves or of the muscles of the 

 pharynx. This condition is usually associated with rabies, although 

 it has been observed independent of that disease and probably 



