THE URO-GENITAL SYSTEM 101 



discolored with hemaglobin and will contain blood casts. 

 Renal-tissue hemorrhages may be extensive or limited, 

 but rarely is extensive extravasation observed in the 

 kidney. Small-tissue hemorrhages, particularly petechial 

 hemorrhages, are of common occurrence in the kidney of 

 swine affected with hog cholera. Such hemorrhages 

 have been observed in the kidney of otherwise apparently 

 healthy swine in which no other lesions of cholera could 

 be detected, and the blood from these hogs, when injected 

 into healthy, susceptible pigs, failed to produce evidence 

 of hog cholera. These hemorrhages were not numerous; 

 sometimes only a very few could be recognized by a 

 careful examination; their exact relation has not been 

 discovered. The petechial hemorrhage of cholera merely 

 evidences a vascular disturbance. 



Symptoms. Hematuria indicates hemorrhage into 

 the urine in the kidney, ureter, bladder, or urethra. Renal 

 hematuria is characterized by bloody urine and the 

 presence of, blood-tube casts. 



Fatty Changes 



The occurrence of the so-called large white kidney is 

 a common experience, at least to those engaged in meat 

 inspection. "Large white kidney" is a name applied to 

 two different conditions fatty kidney and fibrous kidney. 

 The fatty white kidney is less common than the fibrous 

 white kidney. 



Etiology. Some renal vascular disturbance resulting 

 in blood disturbance in the kidney or general malnutrition 

 appears to be the causative factor in the production of 

 fatty kidneys. 



Lesions. The affected kidney is large and creamy 

 white in color. The capsule is easily stripped, and the 

 kidney substance is soft and feels greasy. Only one 

 kidney is affected in those cases in which the kidney is 

 exceedingly large. Both kidneys may be affected, but 

 to a limited degree. 



Symptoms. No primary symptoms characterize 

 this condition. It is detected only in autopsy. 



