HOG CHOLERA 



331 



of hours, it is likely to be of little service i i making a di- 

 agnosis because >f post-mortem changes. 



Lesions. The extent of the changes in tin- organs will 

 depend on the length of the attack. If the animal died of 

 acute hog cholera, the lesions will not, as a rule, be so 

 marked as in the more chronic form. The color of the 

 skin should be noted. Red or pnrnlish blotches are signi- 

 ficant. The abdominal and lung cavities should be- care- 

 fully opened and the following organs examined. The 

 kidneys in the acute cases are likely to be darker than nor- 



Fig. 61. Hog Cholera 



Button ulcers on the intestinal wall art- frequently noted in cases of chronic 



cholera 



mal, and to show small, red spots which impart to the 

 oriran a " turkcy-euu " appearance. The spleen or milt is 

 usually enlarged, dark, and soft : the liver is normal in ap- 

 pearance; and the membranes of the abdominal cavity, the 

 stomach, and the small intestines may show red areas, as 

 if blood had been spattered on them. It will be found im- 

 possible to remove the blood by washing, showing it to be 

 in the tissues rather than on them. The hemorrhages are 

 to be found in many different parts of the body, and may 

 vary in size from the pinpoint spots noted in the kidneys to 

 areas of considerable size. The lungs may or may not be 

 affected. If they are, the hemorrhages are present and 



