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Updated: Mar 7, 2026

Intrarenal Injection of Escherichia coli in a Rat Model of Pyelonephritis
Published on: July 18, 2017
[Experimental modeling of acute pyelonephritis]
M I Kogan1, Y U L Naboka1, I A Gudima1
1Chair of urology and human reproductive health with child urology andrology course of the FPK and PPS GBOU VPO RostGMU, Russian Federation Ministry of Health RostGMU Russian Federation Ministry of Health.
Acute pyelonephritis (AP), a common kidney infection, may involve anaerobic bacteria, not just common aerobic pathogens. Further research is needed to understand the role of these less-studied microorganisms in AP etiology.
Area of Science:
- Nephrology
- Infectious Diseases
- Microbiology
Background:
- Acute pyelonephritis (AP) is a significant upper urinary tract infection with potential progression to chronic kidney disease.
- Current understanding of AP etiology primarily focuses on aerobic bacteria like Enterobacteriaceae and Pseudomonas spp.
- Rare reports suggest anaerobic microorganisms may also cause AP, a factor often overlooked in clinical practice.
Purpose of the Study:
- To analyze experimental disease models to refine the understanding of AP etiology.
- To investigate the potential role of anaerobic microorganisms in the development of acute pyelonephritis.
- To bridge the gap between current clinical practice and emerging evidence on AP pathogenesis.
Main Methods:
- Comprehensive literature review of Russian and English databases (PubMed, MEDLINE, etc.).
- Analysis of 356 identified literature sources, with 41 selected for in-depth review.
- Focus on experimental disease models and clinical case reports concerning AP pathogens.
Main Results:
- The study reviewed existing literature on AP etiology, including less common causes.
- Evidence suggests a potential, yet underappreciated, role for anaerobic microorganisms in AP development.
- The review highlights the need to consider a broader range of pathogens in AP diagnosis and treatment.
Conclusions:
- Acute pyelonephritis etiology may be more complex than currently recognized, potentially involving anaerobic bacteria.
- Current clinical practice may not adequately account for anaerobic infections in AP.
- Further research into anaerobic microorganisms as causative agents of AP is warranted.
Related Concept Videos
Acute Pyelonephritis II: Diagnostic Studies and Management
Acute Pyelonephritis I: Introduction
Urinary Tract Infection II: Pathophysiology
Acute Kidney Injury II: Pathophysiology
Acute Kidney Injury IV: Diagnostic Studies and Prevention

