Related Experiment Video

Updated: Jun 5, 2026

Replication of the Ordered, Nonredundant Library of Pseudomonas aeruginosa strain PA14 Transposon Insertion Mutants
11:35

Replication of the Ordered, Nonredundant Library of Pseudomonas aeruginosa strain PA14 Transposon Insertion Mutants

Published on: May 4, 2018

Genotypic and phenotypic characterization of Pseudomonas aeruginosa isolates from urinary tract infections

Petra Tielen1, Maike Narten, Nathalie Rosin

  • 1Institute of Microbiology, Technische Universität Braunschweig, Spielmannstrasse 7, D-38106 Braunschweig, Germany. p.tielen@tu-bs.de

International Journal of Medical Microbiology : IJMM
|January 4, 2011
PubMed

Insights

Pseudomonas aeruginosa causes urinary tract infections, particularly in catheterized patients. This study found diverse bacterial groups, with catheter-associated strains showing increased biofilm formation and reduced motility, highlighting infection-specific adaptations.

Area of Science:

  • Microbiology
  • Infectious Diseases
  • Genomics

Background:

  • Pseudomonas aeruginosa is a significant cause of urinary tract infections (UTIs).
  • Indwelling urethral catheters are a common risk factor for P. aeruginosa UTIs.
  • Understanding the genetic and phenotypic diversity of these isolates is crucial for effective treatment.

Purpose of the Study:

  • To investigate the genotypic and phenotypic characteristics of P. aeruginosa isolates from UTIs.
  • To identify distinct genotypic groups within urethral P. aeruginosa.
  • To compare characteristics of strains from catheter-associated infections versus acute UTIs.

Main Methods:

  • Genotypic characterization using 'Single Nucleotide Polymorphism' (SNP) chip typing.
  • Bioinformatical cluster analyses for isolate grouping.
  • Phenotypic analysis including pyoverdin, protease, phospholipase A, quorum sensing, biofilm formation, motility, pyocyanin, phospholipase C, and elastase production.

Main Results:

  • Genotypic analysis revealed heterogeneity among urethral P. aeruginosa isolates, with some similarities to lung and environmental strains.
  • Distinct urinary tract-specific genotypic groups were identified.
  • Common phenotypes included pyoverdin, protease, and phospholipase A production, quorum sensing, and biofilm formation.
  • Swarming, pyocyanin, phospholipase C, and elastase production were rare.
  • Catheter-associated isolates exhibited significantly enhanced biofilm formation and decreased motility compared to acute UTI isolates.

Conclusions:

  • P. aeruginosa exhibits significant genotypic and phenotypic heterogeneity in UTIs.
  • Catheter-associated P. aeruginosa strains display adaptive traits, including enhanced biofilm formation and reduced motility.
  • These findings suggest distinct evolutionary pathways and adaptations of P. aeruginosa in different UTI contexts.

More Related Videos

Use of Artificial Sputum Medium to Test Antibiotic Efficacy Against Pseudomonas aeruginosa in Conditions More Relevant to the Cystic Fibrosis Lung07:46

Use of Artificial Sputum Medium to Test Antibiotic Efficacy Against Pseudomonas aeruginosa in Conditions More Relevant to the Cystic Fibrosis Lung

Published on: June 5, 2012

Time-Lapse Epifluorescence Microscopy Imaging of Pseudomonas aeruginosa and Staphylococcus aureus Heterogeneous Phenotypes07:44

Time-Lapse Epifluorescence Microscopy Imaging of Pseudomonas aeruginosa and Staphylococcus aureus Heterogeneous Phenotypes

Published on: February 14, 2025

Related Concept Videos

Urinary Tract Infection I: Introduction01:26

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: Pathophysiology01:25

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

Urine Studies II: Urine Culture and Sensitivity Test

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...
Atypical Pneumonia01:14

Atypical Pneumonia

Atypical pneumonia, often caused by Mycoplasma pneumoniae, is a form of pulmonary infection that differs from the classical presentation of bacterial pneumonia in both its cause and clinical symptoms. Mycoplasma pneumoniae is a pleomorphic bacterium notable for its lack of a rigid cell wall. This structural characteristic imparts resistance to beta-lactam antibiotics and significantly influences the bacterium’s behavior within the human host.Other pathogens responsible for the disease include...
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 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...