72 HOG CHOLERA 



This latter fact alone will distinguish it from hog 

 cholera, when it occurs in pure form. 



Ascaris infestation and hog cholera sometimes 

 exist in the same herd. As a result of the diar- 

 rhea incident to the latter disease ascarids are 

 frequently evacuated in the feces, and the entire 

 train of symptoms, as well as the deaths, is attrib- 

 uted to the parasites alone. Even though the 

 parasites are present in large numbers, if deaths 

 are numerous, further examination should be 

 made for evidence of hog cholera. 



Lung worms cause cough, emaciation and other 

 symptoms which resemble those observed in 

 chronic hog cholera. The history of the outbreak, 

 supplemented if necessary by an autopsy, will be 

 sufficient to determine its cause. Chronic hog 

 cholera is usually a sequel of the acute form. 

 Lung worms are often associated with pneumonia, 

 causing death most frequently in young pigs. 

 Unless great care is used these parasites may be 

 overlooked. The smaller air passages should be 

 laid open with sharp shears and the examination 

 made in a strong light. 



Considered collectively, the various drug and 

 food poisonings differ from hog cholera in that 

 several animals often are affected at the same 

 time, the symptoms as a rule are more violent, 

 vomiting is more common, and temperatures are 

 not so high. The history may reveal the source 



