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Updated: Feb 19, 2026

Intrarenal Injection of Escherichia coli in a Rat Model of Pyelonephritis
Published on: July 18, 2017
[Nephritis in a Staffordshire Terrier puppy caused by Encephalitozoon cuniculi genotype I]
Stephan Engelhardt1, Astrid Buder, Katja Pfeil
1Stephan Engelhardt, Tierklinik Dresdner Heide, Fischhausstraße 5, 01099 Dresden,
Abstract:
An 8-week-old puppy was presented to the clinic because of anorexia, polyuria, polydipsia and azotemia. The urinary sediment displayed large amounts of protozoan-like organisms, which could be identified by PCR as Encephalitozoon cuniculi genotype I. In the immunofluorescence antibody test (IFAT) an antibody titer against E. cuniculi of 1 : 2560 was found. The dog was treated with fenbendazole over 3 weeks. After 3 months, an antibody titer against E. cuniculi could no longer be detected. The dog recovered completely. This rare case demonstrates that E. cuniculi genotype I can cause clinical disease in dogs with renal involvement, which can be successfully treated with fenbendazole.
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