182 



SWINE PRACTICE 



the reports of clinical cases of nephritis in swine are very rare. 

 "Urinalysis is not practiced systematically by veterinarians, and the 

 analysis of swine urine by practitioners is practically an unheard-of 

 procedure. According to the findings of the veterinary inspectors, 

 porcine nephritis is very common. In some instances nephritis ap- 

 pears to be the only pathologic condition existing, but it is also an 



e\¥ « 





Fig. 37. HTPEBEMic KIDNEY. A, convoluted tubule; B, glomerules engorged 

 with blood; C, engorged capillaries between tubules. 



accompanying pathologic factor in such diseases as hog cholera, swine 

 plague, septicemia, and pneumonia. 



Acute Parenchymatous Nephritis 



This is an inflanunation of the cells of the glomeruli and convoluted 

 tubules and is characterized by a rather rapid onset, tumefaction, 

 and frequently destruction of the affected epithelium. 



Etiology. — Exposure to cold and injuries of various kinds pre- 

 dispose to this disease. The specific exciting causes are usually 

 chemical substances that are being eliminated through the renal 

 epithelium. Bacterial products, and vegetable and mineral poisons, 

 when present in sufficient quantities, are capable of establishing in- 



