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Canine glomerulonephritis: prevalence in dogs submitted at random for euthanasia
Summary
Immune complex glomerulonephritis (GN) is more common in adult and aged dogs than previously thought. Kidney pathology, including GN, may occur without obvious clinical signs in older dogs.
Area of Science:
- Veterinary Pathology
- Immunopathology
- Canine Nephrology
Background:
- Immune complex glomerulonephritis (GN) is a significant kidney disease.
- Limited data exists on the prevalence and presentation of GN in stray dog populations.
Purpose of the Study:
- To investigate the prevalence of immune complex GN in stray dogs using immunofluorescence and histology.
- To correlate renal pathology findings with age and clinical signs.
Main Methods:
- Kidney samples from 71 stray dogs were analyzed using direct immunofluorescence (IF) for IgG deposits and histopathology.
- Dogs were categorized into three age groups: young (<1 year), adult, and aged.
Main Results:
- IgG deposits indicative of GN were detected in 0% of young dogs, 30% of adult dogs, and 50% of aged dogs.
- Diffuse proliferative GN was observed in 0%, 26%, and 47% of young, adult, and aged dogs, respectively.
- Histological signs of membranous nephropathy were present in one adult and two aged dogs.
Conclusions:
- Glomerulonephritis may be more prevalent in dogs than previously recognized, particularly in adult and aged animals.
- Renal pathological changes, including GN, can occur in aged dogs without a clear correlation with clinical findings or consistent histopathology results.