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In a  male, 10-month-old, friesian calf the following lesions were observed in the kidneys.

What is your diagnosis? (48)

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  The histopathological study demonstrated that the lesions consisted of a generalized multifocal pyelonephritis. A pyelonephritis consists in inflammation of the renal pelvis and renal parenchyma, usually as a result of an ascending bacterial infection from the lower urinary tract. It can be bilateral or unilateral. One of the two kidneys also has hydronephrosis, probably secondary to a uretheral obstruction and/or due to the presence of purulent exudates in the kidney pelvis. The most common bacteria that are isolated from this type of lesion are E.Coli, staphylococci, streptococci, Enterobacter, Proteus and also, in the case of  cattle, specific urinary pathogens such as Corynebacterium renale, C. cystitidis and C. pilosum.
Your answers are highlighted below.
Question 1
What is the name of the lesion shown in these kidneys?
A
Glomerulonephritis
B
Interstitial nephritis
C
Pyelonephritis
D
Urolithiasis
E
Neoplastic metastasis (lymphoma)
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