8 



FARMERS' BULLETIN 834. 



apparently well for several days, when others are likely to be found 

 affected in about the same way as those first attacked. As the disease 

 progresses the sick hogs become gaunt or tucked up in the flank, and 

 have a weak, staggering gait, the weakness being most marked in the 

 hind legs. 



If the lungs are affected there may be a cough, which is particularly 

 noticeable 'when the hogs are disturbed. The eyes usually are in- 

 flamed and show a whitish discharge, which may cause the lids to 

 stick together. 



Constipation, which is commonly present in the early days of the 

 disease, is generally followed by a diarrhea. As the disease reaches 

 its height, red or purplish blotches are likely to appear upon the skin 

 of the ears, of the belly, and of the inner surfaces of the legs. 



Some of the symptoms mentioned may be present in other diseases, 

 but the owner should remember that cholera spreads rapidly through 

 a herd (fig. 4) and too much time should not be lost in undertaking 

 to distinguish it from some other disease. 



The temperature of the hogs is of much importance in diagnosing 

 cholera. The normal temperature in ordinary weather when the 

 hogs are not excited or worried will range from 101° to 104° F., but 

 when cholera is present it is not uncommon to find a large proportion 

 of the hogs with temperatures from 104° to 107°, and even higher. 



Fig. 3. — First indications of cholera ; two pigs remaining in nest. 



