Acute renal injury from thrombotic microangiopathy associated with enteritis in New Zealand white rabbits
2022
Waggie, Kimberly S. | Snyder, Jessica M. | Treuting, Piper M.
Over a 3-y period, 12 adult New Zealand white (NZW) rabbits were presented for postmortem examination following variably long periods of inappetence and soft-to-liquid stool production. Postmortem findings included serosanguineous fluid in abdominal and thoracic cavities, dark-red-to-white renal foci, reddened intestinal serosa, and pulmonary edema. Microscopically, mesangial changes and thrombi were observed in renal glomeruli, and mild-to-severe enteritis was observed. These findings resemble hemolytic uremic syndrome, which typically follows enterocolitis associated with Shiga toxin (Stx)-producing Escherichia coli infection. In our case series, various gram-negative bacteria, most commonly E. coli, were isolated from the intestinal tracts; however, Stx production was not demonstrated. Evidence of Encephalitozoon cuniculi infection, a common cause of renal disease in rabbits, was also not found. Our cases suggest that gram-negative enteric bacteria should be included in the differential diagnosis of renal disease in NZW rabbits, especially in cases with an accompanying clinical history of gastrointestinal disorder.
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