Author, Donkey, Bureaucrats, Administrators
53,803
edits
Changes
Jump to navigation
Jump to search
no edit summary
*Pyelonephritis is inflammation of the renal pelvis and parenchyma.
*Most often occurs in cows and sows.
*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.
*Usually occurs due to ascending bacterial infection from the lower urinary tract.
'''Gross pathology'''
*Kidney may be swollen with external patchy congestion.
*The medulla has streaks of inflammatory debris that extend into the cortex.
*The renal pelvis as well as the ureters are dilated and contain pus.
*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.
'''Histopathology'''
*Dilated tubules filled with [[Neutrophils|neutrophils]].
*Presences of bacteria within the tubules.
*Necrosis of the pelvic epithelium and collecting tubules.
*In chronic cases, presence of fibrosis within the medulla as well as ascending fibrous tracts into the cortex.
'''Examples'''
*''[[Corynebacterium renale]]'' in cattle and ''Eubacterium suis'' in pigs.
'''Definitons'''
*''Pyelitis'' - infection involving the renal pelvis alone.
*''Pyonephritis'' - suppuration of the whole kidney.
[[Category:Tubulointerstitial Disease]]
[[Category:To Do - Urinary]]