Related Experiment Video

Updated: May 2, 2026

Modeling Persistent Pseudomonas aeruginosa Infection in Wounded Zebrafish Larvae
06:04

Modeling Persistent Pseudomonas aeruginosa Infection in Wounded Zebrafish Larvae

Published on: June 13, 2025

933

[Immune evasion of Pseudomonas aeruginosa]

Takahiro Shimada1, Itaru Matsumura

  • 1Division of Hematology and Rheumatology, Department of Internal Medicine, Kinki University Faculty of Medicine.

Nihon Rinsho Men'Eki Gakkai Kaishi = Japanese Journal of Clinical Immunology
|March 7, 2014
PubMed

Insights

Pseudomonas aeruginosa, a common opportunistic pathogen, causes severe infections in immunocompromised individuals. This review details its virulence factors, immune evasion strategies, and host defense mechanisms, highlighting challenges posed by multidrug resistance.

Area of Science:

  • Microbiology
  • Immunology
  • Infectious Diseases

Background:

  • Pseudomonas aeruginosa is an opportunistic pathogen found in aqueous environments.
  • It causes severe infections, particularly in immunocompromised hosts, and is a leading cause of nosocomial infections.
  • Emerging multidrug resistance in P. aeruginosa poses significant clinical challenges.

Purpose of the Study:

  • To review the virulence factors of P. aeruginosa.
  • To describe mechanisms of host immune system evasion by P. aeruginosa.
  • To outline host defense mechanisms against P. aeruginosa infection.

Main Methods:

  • Analysis of studies using gene-disrupted mutant bacterial strains to identify virulence factors.
  • Investigation of host defense mechanisms using gene-targeting mouse models.
  • Review of research on quorum sensing in P. aeruginosa virulence.

Main Results:

  • P. aeruginosa utilizes virulence factors like type 3 secretion system, exoenzymes, and biofilm formation to impair host immunity.
  • Quorum sensing regulates P. aeruginosa virulence.
  • Host immune systems have mechanisms to detect and defend against P. aeruginosa, but evasion strategies exist.

Conclusions:

  • Understanding P. aeruginosa virulence and host-pathogen interactions is crucial for combating infections.
  • Further research into multidrug resistance and immune evasion is necessary.
  • This review synthesizes current knowledge on P. aeruginosa pathogenesis and host defense.

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

34.5K
Long Term Chronic Pseudomonas aeruginosa Airway Infection in Mice15:43

Long Term Chronic Pseudomonas aeruginosa Airway Infection in Mice

Published on: March 17, 2014

23.0K

Related Concept Videos

Defense Against Bacterial Pathogens01:31

Defense Against Bacterial Pathogens

The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
3.0K
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...
77
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,...
954
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...
90
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...
84
Mechanism of Antibiotic Resistance in MRSA01:25

Mechanism of Antibiotic Resistance in MRSA

Antibiotic resistance in bacteria arises when microorganisms evolve the ability to withstand drugs designed to kill them or inhibit their growth, rendering once-effective treatments useless. This phenomenon, driven by genetic change and selection under antibiotic exposure, poses a profound threat to modern medicine. Mechanisms include drug-inactivating enzymes (e.g., β-lactamases), efflux pumps that eject antibiotics, mutations altering antibiotic targets, decreased drug uptake, and...
219