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| − | *Pyelonephritis is inflammation of the renal pelvis and parenchyma.
| + | caused by [[Corynebacterium renale]] |
| − | *Most often occurs in cows and sows.
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| − | *Main predisposing factor is urinary stasis which can occur due to pregnancy, following service in the sow, following uterine and bladder prolapse or the use of catheters in small animals.
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| − | *Usually occurs due to ascending bacterial infection from the lower urinary tract.
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| − | '''Gross pathology'''
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| − | *Kidney may be swollen with external patchy congestion.
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| − | *The medulla has streaks of inflammatory debris that extend into the cortex.
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| − | *The renal pelvis as well as the ureters are dilated and contain pus.
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| − | *In chronic cases, the kidney is shrunken, distorted and has gray patches among a diffuse, tan discolouration. The medulla has fibrous tracts that run into the capsule.
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| − | '''Histopathology'''
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| − | *Dilated tubules filled with [[Neutrophils|neutrophils]].
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| − | *Presences of bacteria within the tubules.
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| − | *Necrosis of the pelvic epithelium and collecting tubules.
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| − | *In chronic cases, presence of fibrosis within the medulla as well as ascending fibrous tracts into the cortex.
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| − | '''Examples'''
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| − | *''[[Corynebacterium renale]]'' in cattle and ''Eubacterium suis'' in pigs.
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| − | '''Definitons'''
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| − | *''Pyelitis'' - infection involving the renal pelvis alone.
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| − | *''Pyonephritis'' - suppuration of the whole kidney.
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| − | [[Category:Tubulointerstitial Disease]]
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| − | [[Category:To Do - Urinary]]
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