12 SWINE DISEASES 



cumscribed, nonsuppurative or suppurative. Diffuse 

 nonsuppurative subsurface glossitis is usually acute and is 

 the result of infection with streptococci or some septic 

 microorganism. The lesions in this type of glossitis 

 consist of a diffuse, extensive tumefaction of the tongue, 

 which on section evidences enlargement of the blood 

 vessels and abundant accumulations of pus, or other 

 inflammatory products, between the muscle bundles, 

 while the muscle tissue will have a parboiled appearance. 

 Acute circumscribed subsurface suppurative glossitis par- 

 takes of the nature of an abscess. Chronic glossitis is 

 most frequently diffuse and is exemplified in those cases 

 of diffuse lingual actinomycosis. The lesions consist 

 primarily of an excessive quantity of fibrous tissue which 

 may contract unequally in different portions of the 

 tongue, thus producing an irregularity of the surface of 

 the organ. Portions of the tongue in which excessive 

 quantities of fibrous tissues are developed become dense 

 and hard, and cut with considerable resistance. 



Tumors 



Lingual tumors are relatively uncommon, but retention 

 or obstruction cyst& have been observed. 



Parasites 



Parasitic invasion of the tongue is not uncommon. 

 The cystic form of the Tsenia solium, that is, the 

 Cysticercus cellulosae, frequently occurs in the muscular 

 portion of the tongue. The cystic form of the Tri- 

 chinella has also been observed in lingual muscles, while 

 psorosperms occasionally inhabit the muscle of the tongue. 



MOUTH 



The mucous membrane of the mouth, other than 

 that mentioned in relation to the lips and tongue, is 

 subject to injuries of a similar origin and nature and 

 will not be further discussed here. 



