.•244 PEINCIPLES OF VETEEINARY SUBGEET 



septic measures. In the shoulder abscess do not waste time 

 Tvith external applications, but slit the indurated'muscle open 

 ^nd if necessary open the pus carity with a boring motion of 

 ihe extended finger. 



INTERSTITIAL MYOSITIS. 



What is interstitial myositis ? 



It represents a chronic inflammatory process with con- 

 nective tissue proliferation mainly of the internal perimysium, 

 which gradually replaces the contractile substance, as a result 

 of which the muscle becomes shorter and harder. 



What are the causes of interstitial myositis ? 



The etiology of this myositis is still a little obscure. It 

 -seems that parasites and bacteria play an important role. 



Where is it commonly seen ? 



In chronic muscular rheumatism, in traumatic purulent 

 rstates of the muscles, in specific infection, as actinomycosis 

 -and muscular atrophy, etc. 



OSSIFYING MYOSITIS. 



What is an ossifying myositis ? 



A myositis of rare occurrence, where the connective tissue 

 — that is, the perimysium — is gradually changed into bony 

 tissue, which, as the result of its development, causes degen- 

 eration and atrophy of the muscular fibers. 



How is this ossifying myositis explained ? 



There are two forms. In the primary ossifying myositis, 

 -one deals with a neof ormation ; in other words, an osteoma— 

 that is, a bony tumor— is directly developed. In secondary 

 •ossifying myositis, the ossification of the perimysium is a sec- 

 ondary process, there being first the formation of exostoses at 



