DIAGNOSIS, DIFFERENTIAL DIAGNOSIS, PROGNOSIS 71 



temperatures are not common, and the prominent 

 symptoms grow out of the pneumonia itself. 



Exceptionally septicemia due to nonspecific or- 

 ganisms may occur, but its features are not well 

 defined. In differentiating we must therefore de- 

 pend on the more definite manifestations of hog 

 cholera. 



Tuberculosis may only rarely be confused with 

 chronic hog cholera. Hogs following tuberculous 

 cattle and those fed infected creamery by-prod- 

 ucts are most commonly affected. The history of 

 the case should be considered and if doubt remains 

 the intradermal tuberculin test may be applied. 

 If material for autopsies is available, the differ- 

 entiation presents no great difficulties. 



Anthrax and the peracute form of hog cholera 

 are not always easy to differentiate. If the for- 

 mer disease has existed previously in the locality ; 

 if other classes of live stock are affected; if the 

 hogs show swelling of the throat or froth mixed 

 with blood coming from the mouth or nostrils ; if 

 the blood is black and incoagulable, anthrax should 

 be suspected, and a microscopical examination 

 made. 



A malady known as * 'state fair disease* ' or 

 "flu" has in recent years been recognized in the 

 central states. It is often associated with a his- 

 tory of recent shipping, respiratory symptoms 

 and lesions predominate, and recovery is the rule. 



