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In a batch of lambs white renal lesions of different sizes (from 1mm to 1cm) can be seen, which, when cutting the kidney, can be observed to affect the entire thickness of the renal cortex.

Presence of whitish spots of varying size in a batch of lamb kidneys.


When opening the kidney it is appraised how the lesion affects the entire cortex thickness.


Detail of one of the kidneys with the most extensive lesions.


Other lesions are smaller and focal, but still affect the entire thickness of the cortex.



The histopathological study revealed, in the different kidneys, lesions compatible with chronic non-suppurative interstitial nephritis. The causes of interstitial nephritis in small ruminants are little known, the literature points out viral infections as a possible cause (poxvirus and Maedi-Visna viruses). In calves these lesions are associated to bacterial infections (E.coli, Salmonella, Brucella) and are usually accidental findings,
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Question 1
What is your diganosis?
Renal infarction
Embolic nephritis
Interstitial nephritis
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