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Acute Pyelonephritis I: Introduction

Acute Pyelonephritis I: Introduction

Pyelonephritis is a bacterial infection that primarily affects the renal parenchyma and collecting system, including the renal pelvis, tubules, and interstitial tissue of one or both kidneys. It can be classified as either acute—a sudden, severe infection—or chronic, which refers to long-term or recurrent kidney infections.The primary cause of acute pyelonephritis (APN) is bacterial infection, with Escherichia coli accounting for approximately 70-80% of cases. Other bacteria, such as Proteus,...

Acute Pyelonephritis II: Diagnostic Studies and Management

Acute Pyelonephritis II: Diagnostic Studies and Management

Introduction:For diagnosing acute pyelonephritis, a comprehensive patient history is collected to identify symptoms such as dysuria, frequent or urgent urination, flank pain, or costovertebral angle (CVA) tenderness that may suggest a kidney infection.Physical ExaminationDuring the physical examination, CVA tenderness is assessed. This involves gentle percussion over the costovertebral angle, where tenderness often indicates a kidney infection.Diagnostic TestsUrinalysis: Used to identify white...

Urinary Tract Infection I: Introduction

Urinary Tract Infection I: Introduction

Urinary tract infections (UTIs) impact various parts of the urinary system, including the kidneys, ureters, bladder, and urethra. These infections are generally bacterial, with Escherichia coli being the most common causative agent, often originating from the gastrointestinal tract. However, other bacteria, such as Staphylococcus saprophyticus, Klebsiella pneumoniae, and Proteus mirabilis, are also known to cause UTIs. The type, location, and underlying complexity of the UTI guide both...

Urinary Tract Infection II: Pathophysiology

Urinary Tract Infection II: Pathophysiology

The pathophysiology of urinary tract infections (UTIs) encompasses several progressive stages, beginning with bacterial colonization and culminating in potential systemic complications if untreated. UTIs are primarily initiated by bacteria, such as Escherichia coli, which often originate from the gastrointestinal tract and migrate to the urinary system through the periurethral area. This migration can occur via several routes, including improper hygiene practices, sexual activity, or...

Urinary Tract Infection III: Diagnostic Studies and Interprofessional Care

Urinary Tract Infection III: Diagnostic Studies and Interprofessional Care

A healthcare provider can diagnose a urinary tract infection (UTI) through several methods:Medical History and Symptoms: The provider will take a detailed medical history and ask about symptoms such as frequent urination, burning sensation during urination, and lower abdominal pain.Urinalysis: A clean-catch urine sample is collected in a sterile container and tested for the presence of bacteria, white blood cells (leukocytes), nitrites, blood, and protein. The presence of leukocytes and...

Urinary Tract Infection IV: Nursing Management

Urinary Tract Infection IV: Nursing Management

In managing urinary tract infections (UTIs) in nursing, a comprehensive assessment is essential. Begin by gathering subjective data, such as the patient’s complaints of dysuria (painful urination), urinary frequency, urgency, suprapubic pain, and any lower abdominal discomfort. This information can be complemented by questions regarding previous UTIs, sexual activity, and personal hygiene practices, which can provide insight into risk factors. Objective assessment should focus on signs like...

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Related Experiment Video

Updated: Jul 15, 2026

Intrarenal Injection of Escherichia coli in a Rat Model of Pyelonephritis

Intrarenal Injection of Escherichia coli in a Rat Model of Pyelonephritis

Published on: July 18, 2017

[Acute pyelonephritis in adults].

¹Divisione di Nefrologia e Dialisi, Ospedale S.G. Bosco, Torino. cristiana.rollino@libero.it

Giornale Italiano Di Nefrologia : Organo Ufficiale Della Societa Italiana Di Nefrologia

|April 27, 2007

Summary

Acute pyelonephritis (APN), a common kidney infection, often caused by E. coli, requires prompt diagnosis and treatment. Imaging like CT or NMR is crucial for severe cases and identifying abscesses, which need drainage only if large.

Area of Science:

Nephrology
Infectious Diseases
Urology

Background:

Acute pyelonephritis (APN) is a significant cause of hospitalization in the US, frequently linked to Escherichia coli.
Risk factors include sexual activity, genetics, advanced age, and urinary tract instrumentation.
The relationship between APN and vesicoureteral reflux requires further investigation.

Purpose of the Study:

To summarize the current understanding of acute pyelonephritis.
To highlight diagnostic modalities and treatment strategies for APN.
To discuss complications and special considerations in APN management.

Main Methods:

Diagnosis can be clinical, but advanced imaging like computed tomography (CT) or nuclear magnetic resonance (NMR) spectroscopy offers precise evaluation.

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Intrarenal Injection of Escherichia coli in a Rat Model of Pyelonephritis

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Identification of renal abscesses is aided by CT or NMR spectroscopy.

Treatment recommendations include fluoroquinolones or extended-spectrum cephalosporins, potentially with aminoglycosides.

Main Results:

Severe APN cases necessitate specific antibiotic regimens (fluoroquinolones or cephalosporins) for at least 10 days.
Renal abscess formation is a recognized complication that requires careful assessment via imaging.
Large abscesses are the primary indication for drainage.

Conclusions:

Prompt and accurate diagnosis, often aided by CT or NMR, is essential for effective APN management.
Appropriate antibiotic therapy duration is critical for favorable outcomes.
Long-term sequelae of APN, such as renal scarring and failure, warrant further study, especially in high-risk populations like diabetics or transplant recipients.