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Update on endocarditis-associated glomerulonephritis
Christie L Boils1, Samih H Nasr2, Patrick D Walker1
1Nephropath, Little Rock, Arkansas, USA.
Kidney International
|January 22, 2015
Summary
Infective endocarditis (IE) commonly causes kidney disease, specifically glomerulonephritis (GN). This study found Staphylococcus infections and tricuspid valve issues are frequent causes of IE-associated GN, often presenting as acute kidney injury.
Area of Science:
- Nephrology
- Infectious Diseases
- Cardiology
Background:
- Glomerulonephritis (GN) linked to infective endocarditis (IE) is known but data is dated.
- Previous studies relied on autopsy findings, necessitating updated biopsy-based research.
Purpose of the Study:
- To present the largest clinicopathologic series of IE-associated GN using biopsy data.
- To update understanding of the clinical presentation, microbiology, and histopathology of IE-GN.
Main Methods:
- Retrospective analysis of 49 patients with biopsy-proven IE-associated GN.
- Review of clinical data, comorbidities, cardiac valve involvement, causative bacteria, serological markers, and kidney biopsy findings.
Main Results:
- The most common presentation was acute kidney injury (AKI).
- Staphylococcus species, particularly in tricuspid valve infections, were the most frequent culprits.
- Necrotizing and crescentic GN was the predominant biopsy finding (53%), differing from other infection-associated GN patterns.
Conclusions:
- IE-associated GN typically presents as AKI, often linked to Staphylococcus infections of the tricuspid valve.
- The characteristic glomerular injury pattern is necrotizing and crescentic GN, distinguishing it from other forms of infection-associated GN.
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