DISEASES OF AETICULATIONS 203 



Describe the changes in the joints. 



As a rule, a number of articulations are attacked at the 

 same time (polyartliritis). At first there is a serous synovitis 

 leading in some cases by its chronicity to an arthritis 

 deformans. In the acute cases the synovial membrane is red- 

 dish and swollen. The articular cartilage is also reddish, 

 becomes later yellowish and has a velvety appearance. The 

 epiphyseal ends of the bones appear reddened and even hem- 

 orrhagic, the marrow showing a similar state. The tissues 

 surrounding the joint are hyperemic and cedematous. In 

 advanced stages the synovial membrane is very much thick- 

 ened, the cavity of the joint may show the changes of a pan- 

 neons arthritis, the articular cartilage undergoes fatty degen- 

 eration and ulceration. A true arthritis deformans is occa- 

 sionally observed. Of other symptoms, those of endocarditis, 

 pleurisy and peritonitis complicate the case. 



What animals are most subject to articular rhev/matism ? 

 Especially cattle ; more rarely horses, dogs, swine. 



Sow do you treat articular rheumatism, ? 



Main reliance is placed upon large doses of sodium 

 .salicylate. 

 What is pyemic and septic arthritis of the youmg f 



A purulent polyarthritis of metastatic origin, the result 

 of an infection Of the umbilical wound of the newly born. 



OuUine the diseased process . 



Infection of the navel leads to the formation of a purulent 

 thrombus in the bloodvessels of that region ; in other words, 

 there is a purulent thrombophlebitis and thromboarthritis. 

 Little bits of this purulent thrombus break off (embolus) 

 which, carried away by the circulation, produce a general 



