Establishment of Pseudomonas aeruginosa infection: lessons from a versatile opportunist

J B Lyczak1, C L Cannon, G B Pier

  • 1The Channing Laboratory, Brigham and Women's Hospital, 181 Longwood Avenue, Boston, MA 02115, USA.

Microbes and Infection
|September 1, 2000
PubMed

Insights

Pseudomonas aeruginosa is a versatile pathogen causing infections in various tissues. Its virulence relies on numerous factors like pili, flagella, and toxins.

Area of Science:

  • Microbiology
  • Pathogen Research
  • Bacterial Virulence

Background:

  • Pseudomonas aeruginosa is a widespread opportunistic pathogen.
  • It causes severe infections in tissues such as burn wounds, lungs, and eyes.
  • Numerous virulence factors contribute to its pathogenicity.

Purpose of the Study:

  • To outline the key virulence factors of Pseudomonas aeruginosa.
  • To highlight its role in various human infections.

Main Methods:

  • Literature review of Pseudomonas aeruginosa virulence factors.
  • Analysis of factors contributing to tissue-specific infections.

Main Results:

  • Identified prominent virulence factors including pili, flagella, lipopolysaccharide, proteases, quorum sensing, exotoxin A, and type III secretion system exoenzymes.
  • Confirmed the pathogen's ability to infect diverse human tissues.

Conclusions:

  • Pseudomonas aeruginosa possesses a complex array of virulence factors.
  • These factors enable its significant role in infections like burn wounds, lung, and eye infections.

Related Concept Videos

Pneumonia I: Introduction01:30

Pneumonia I: Introduction

Pneumonia is an acute respiratory infection that targets the lungs, specifically the alveoli. These tiny air sacs, essential for oxygen exchange, become engorged with pus and fluid, severely hindering breathing, decreasing oxygen absorption, and causing significant pain and discomfort during respiration.
Risk Factors
Various factors influence the likelihood of developing pneumonia. Age plays a crucial role, with infants, children under two, and individuals over 65 at increased risk due to their...
Gene Regulation in Microbial Communities: Quorum Sensing01:28

Gene Regulation in Microbial Communities: Quorum Sensing

Quorum sensing is a mechanism of bacterial communication that enables coordinated gene expression in response to changes in population density. This facilitates collective behaviors that enhance survival, resource acquisition, and ecological adaptation. This process relies on small signaling molecules called autoinducers that accumulate as bacterial populations grow. When a critical threshold concentration of autoinducers is reached, bacterial cells collectively modify gene expression,...
Colonisation of Pathogens01:25

Colonisation of Pathogens

Pathogen colonization of host tissues is a critical step in the development of infectious diseases. Various pathogenic microorganisms, including bacteria, fungi, viruses, and protozoa, have evolved complex strategies to attach to, invade, and persist within host environments. These mechanisms enable pathogens to establish infections, evade immune responses, and resist antimicrobial treatments.Attachment to Host CellsIn bacteria, colonization typically begins with adherence to host epithelial...
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...
Clinical Significance of Antibiotic Resistance01:25

Clinical Significance of Antibiotic Resistance

Methicillin-resistant Staphylococcus aureus (MRSA) presents a critical public health threat, arising from its capacity to resist β-lactam antibiotics due to acquisition of the mecA gene within the staphylococcal cassette chromosome mec (SCCmec). This gene encodes penicillin-binding protein 2a (PBP2a), which impairs binding efficacy of methicillin and other β-lactams. MRSA has evolved into distinct clonal lineages impacting humans and animals alike, reinforcing its significance within the One...
Pneumonia I: Introduction01:29

Pneumonia I: Introduction

Pneumonia is an infection of the lower respiratory tract that leads to inflammation of the lung parenchyma, often resulting in the accumulation of inflammatory exudate in the alveoli and airways. Unlike the watery, low-protein fluid exudate in pulmonary edema, the exudate in this case is a thick fluid rich in immune cells, proteins, and debris produced during infection and inflammation.This impairs gas exchange and can lead to consolidation of lung tissue. The infection may be caused by a...