PURUIyENT NEPHRITIS. 



Causes : general, traumatic, metastatic, infective, wounds, shocks, strains, 

 blows, falls, crowding, heavy loads, calculi, infective embolism. Lesions : 

 miliary or large abscesses, diffuse suppuration, softening, disintegration, 

 fistula. Symptoms : obscure, nephritic symptoms following distant abscess, 

 chill, hyperthermia, general symptoms of nephritis, pus in urine, anaemia, 

 emaciation. Treatment : to external wound, antiseptics, evacuate abscessi 

 extirpate kidney with pyonephrosis, in dog or pig, calcium sulphide, sul- 

 phites, copiaba. 



Causes. Aside from the main causes of nephritis, the sup- 

 purative form may be determined by traumatic or metastatic 

 infective conditions. Under traumatic factors may be named 

 punctured or gunshot woiinds, shocks and strains connected 

 with falls, blows, crowding, compression, too heavy weights on 

 the back (pack, rider, two wheeled cart loaded too heavily 

 forward and going down hill), and finally calculi in the urini- 

 ferous tubules. Under metastatic factors come all infections, 

 pyaemia, omphalitis, any suppurative affection of the lungs, 

 (abscess, pneumonia, broncho-pneumonia), pharangitis, etc. 

 Embolic renal abscess may start from endocarditis, arteritis, or 

 pulmonary phlebitis. 



Lesions. There may be a circumscribed renal abscess like a 

 good large orange, or many small gray spots like millet seeds, 

 peas or hazel nuts, having purulent centres and containing pus 

 cocci or bacilli. In other cases a diffuse inflammation suppur- 

 ates throughout till the whole gland becomes a pulpy mass of 

 pus, blood and broken down kidney tissue (pyonephrosis). 

 In traumatic cases the pus centres around the wound or injury, 

 perhaps invading adjacent parts, and even communicating 

 through the skin externally along the line of the original wound. 

 The pus may burrow in different directions in the cortex or 

 under the capsule with abscess at intervals (perinephritis), or 

 along the vessels to the medullary structure. 



Symptoms, These are often obscure. The sudden appearance 

 of kidney disease in the course of a suppurative affection else- 

 where, the extension being ushered in by a chill or rigor or 

 attended by a succession of these, and the course marked by 

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