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Related Concept Videos

Microbiota of the Urogenital Tract01:28

Microbiota of the Urogenital Tract

The human urogenital system, once thought to be sterile in healthy individuals, is now recognized as a complex microbial habitat. Advancements in molecular sequencing techniques have revealed that even in healthy adults, the kidneys and bladder harbor microbial populations similar to those found in the distal urethra, albeit in much lower abundance. These resident microorganisms, while generally innocuous, can become opportunistic pathogens under conditions that alter the urogenital...
Urinary Tract Infection II: Pathophysiology01:25

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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...
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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 III: Diagnostic Studies and Interprofessional Care01:30

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...
Acute Pyelonephritis I: Introduction01:27

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,...
Urine Studies II: Urine Culture and Sensitivity Test01:26

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A urine culture and sensitivity test is a diagnostic procedure used to identify urinary tract bacterial infections and determine the most effective antibiotics for treatment. This test is generally preferred when a patient shows manifestations of a urinary tract infection, such as frequent or painful urination, cloudy or foul-smelling urine, or lower abdominal pain.Purpose of the TestThe primary goals of a urine culture and sensitivity test are to:Determine the specific bacteria causing the...

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Recurrent Escherichia coli Urinary Tract Infection Triggered by Gardnerella vaginalis Bladder Exposure in Mice
08:53

Recurrent Escherichia coli Urinary Tract Infection Triggered by Gardnerella vaginalis Bladder Exposure in Mice

Published on: December 4, 2020

Risk factors for non-Escherichia coli community-acquired bacteriuria.

M A Amna1, B Chazan, R Raz

  • 1Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel.

Infection
|October 12, 2012
PubMed
Summary
This summary is machine-generated.

This study identified five key risk factors for community-acquired bacteriuria (CA-Bu) not caused by E. coli. These factors are crucial for guiding empiric antibiotic treatment in adult outpatients with CA-Bu.

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07:34

Isolation of Single Intracellular Bacterial Communities Generated from a Murine Model of Urinary Tract Infection for Downstream Single-cell Analysis

Published on: April 16, 2019

Area of Science:

  • Urology
  • Infectious Diseases
  • Epidemiology

Background:

  • Urinary tract infections (UTIs) are common bacterial infections, with Escherichia coli (E. coli) being the predominant cause of community-acquired bacteriuria (CA-Bu).
  • While E. coli's role in UTIs is well-studied, risk factors for CA-Bu caused by other uropathogens remain less understood.
  • This study aimed to elucidate the current knowledge on risk factors for non-E. coli CA-Bu.

Purpose of the Study:

  • To identify independent risk factors associated with community-acquired bacteriuria (CA-Bu) caused by uropathogens other than Escherichia coli (E. coli) in adult outpatients.
  • To provide data that can inform clinical decision-making regarding empiric antibiotic therapy for UTIs.
  • To update the understanding of CA-Bu epidemiology beyond E. coli.

Main Methods:

  • A clinical epidemiological study was conducted involving adult ambulatory patients.
  • Urine cultures submitted to the Microbiology Laboratory during November 2009 were analyzed.
  • Data collected included patient demographics, underlying diseases, and antibiotic treatments, analyzed using SPSS.

Main Results:

  • Out of 4,653 urine cultures, 1,047 (22.5%) were positive, with 838 included in the study. Most positive cultures (82.5%) were from females.
  • E. coli was the most frequent pathogen (58.6% of positive cultures).
  • Multivariate analysis revealed five independent risk factors for non-E. coli CA-Bu: presence of a urinary tract foreign body (OR 5.8), negative nitrite test (OR 3.2), male gender (OR 2.5), normal erythrocyte count (OR 1.5), and recurrent UTI history (OR 1.5).

Conclusions:

  • Five independent risk factors were identified for adult outpatients with CA-Bu involving uropathogens other than E. coli.
  • These factors include urinary tract foreign body, negative nitrite test, male gender, normal erythrocyte count, and recurrent UTIs.
  • Clinicians should consider these factors when prescribing empiric antibiotic treatment for CA-Bu.