202 PBINCrPLES OF VETEBINAEY SUEGEEY 



Describe dry chronic arthritis {arthritis chronica sicca). 



Quite frequently seen in horses and dogs. It is charac- 

 terized by a fibrillary degeneration of the intercellular sub- 

 stance of the cartilage, foUo-wed by proliferation of the carti- 

 lage cells, which, breaking down, its surface exhibits an 

 eroded, worm-eaten appearance. As the result of the pressure 

 and rubbing motion by the epiphyseal ends of the bones, the 

 cartilage becomes thinner and thinner until eventually the 

 bone, deprived of its articular hyaline cartilage, is exposed. 

 This form of arthritis is observed in the articular cartilage 

 of joints of animals kept for a long time in the stable on 

 account of serious lameness. It is seen in the beginning of 

 arthritis deformans, etc. 



Describe fungous arthritis. 



It is of little practical moment in animals. In birds, ' 

 where it is more frequently met with, it attacks the joints of 

 foot and wing ; in swine, the hock and knee ; in cattle, knee, 

 stifle and hip joints. It consists of an inflammation of the 

 synovial membrane with fungous-like deposits upon it, as 

 well as necrosis and rarefaction of the bones and cartilage. 



W hat is articular rheumatism ? 



A serous polyarthritis due to a general infection. 

 What joints are usually affected ? 



The stifle, hock and carpus. 



What complicatio.n is dangerous and common to it ? 

 Endocarditis. 



Is it a chronic or acute disease ? 



While setting in acutely, its course is a chronic one. 



