DISEASES OF FARM ANIMALS 187 



very acute cases we find areas Intensely inflamed, 

 even bloody in places. The slow chronic cases 

 develop characteristic hog cholera ulcers. These 

 may appear at almost any point on the lining mem- 

 brane, but more particularly in the blind pouch and 

 around the point where the small intestine connects 

 with the large intestine. On stripping off a very 

 thin transparent membrane covering the kidneys, 

 a typical case of hog cholera will usually show 

 minute red spots on the surface somewhat resemb- 

 ling the covering of a turkey egg, which gives the 

 common name of turkey egg kidney of hog cholera. 



Preventing the Disease. — Clearly there are cer- 

 tain things which the owner of heahhy hogs in a 

 hog cholera district should do and a good many 

 things which he should not do. The same is equally 

 true for the man who has sick hogs in a neighbor- 

 hood where there are uninfected herds. The owner 

 of healthy hogs and his family should keep away 

 from public stock yards, from all pens and yards 

 on other farms whether sickness among hogs pre- 

 vails or not. It may easily occur that a neighbor's 

 hogs may appear well but have recently received 

 the infection and be already capable of scattering 

 the disease. We do not know at what period in 

 the development of this disease infected hogs be- 

 come capable of disseminating hog cholera. 



During a hog cholera season the owner of healthy 

 hogs should institute something in the way of pri- 

 vate quarantine and pleasantly, perhaps, but firmly, 

 ask visitors, especially stock buyers and threshing 

 machine crews, to keep at a reasonable distance 

 from the pens and yards. It is safer for one man 

 to have exclusive care of healthy hogs during the 

 hog cholera season, and this man should be very 

 careful where he goes with reference to possible 



