542 SWINE IN AMERICA 



tainty are digestive troubles (due to improper feeding), 

 swine plague, tuberculosis, anthrax, and inflammation of 

 the lungs caused by worms. 



SWINE PLAGUE 



"It is not practicable for a farmer to attempt to dis- 

 tinguish between hog cholera and swine plague, for, 

 while swine plague is generally regarded as a lung affec- 

 tion, and cholera as a disease of the intestines, the fact 

 is that practically all of the lesions which are found in 

 cases of cholera have also been reported as being present 

 in outbreaks of swine plague. There is at present a 

 tendency on the part of those who have investigated 

 these diseases to regard both cholera and swine plague 

 as caused by the same invisible germ, the predominance 

 of lung lesions in one case and intestinal inflammation 

 in the other being caused by the action of different 

 germs which attack the hog after it has been made sick 

 by the invisible germ which is looked upon as the prime 

 cause of the disease in both cases. However this may 

 be, it is quite safe to say that the great losses which 

 occur among hogs in this country are brought about by 

 cholera, and that, for the present at least, we may ignore 

 the existence of swine plague as a separate disease, espe- 

 cially as the general measures for controlling it are the 

 same as those required in cases of cholera. 



HOW CHOLERA DIFFERS FROM TUBERCULOSIS 



"The distinguishing features between hog cholera and 

 tuberculosis are that in tuberculosis the onset is slow 



