CHAPTER IV 



COMPLICATIONS 



BEFORE we consider the symptoms, lesions and 

 diagnosis of hog cholera, it is necessary that we 

 shall discuss briefly some of the organisms that 

 complicate the disease, and which at times exert 

 such profound influence on its course that autop- 

 sies become a continual source of surprise and 

 perplexity to the diagnostician. No attempt will 

 be made to give complete morphological and cul- 

 tural characteristics of these organisms, which in- 

 formation may be found in various standard 

 works on bacteriology. The scope and purpose 

 of this book require that we shall deal only in a 

 general way with most biological characteristics, 

 confining our attention chiefly to disease produc- 

 ing power, especially in swine. 



Bact. suisepticum is the most important of the 

 organisms that complicate hog cholera. It was 

 isolated and described by Loeffler and Schiitz in 

 1885, and in 1886 Dr. Theobald Smith recovered 

 it from various organs of many hogs dead of an 

 epizootic disease in this country. Moore showed 



that it is present in the upper air passages of 



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