Interactions between Pseudomonas aeruginosa and Staphylococcus aureus during co-cultivations and polymicrobial

Angela T Nguyen1, Amanda G Oglesby-Sherrouse2,3

  • 1School of Pharmacy, Department of Pharmaceutical Sciences, University of Maryland, Baltimore, MD, 21201, USA.

Insights

Interactions between Pseudomonas aeruginosa and Staphylococcus aureus can enhance infection virulence. This review explores how these bacterial pathogens interact and impact host environments and treatments.

Area of Science:

  • Microbiology
  • Infectious Diseases
  • Bacterial Pathogenesis

Background:

  • Pseudomonas aeruginosa and Staphylococcus aureus are key pathogens in polymicrobial infections.
  • Interactions between these bacteria range from parasitic to mutualistic, often increasing overall virulence.
  • Host environment significantly influences these interactions, affecting disease and treatment.

Purpose of the Study:

  • To review the impact of Pseudomonas aeruginosa and Staphylococcus aureus interactions on hosts and pathogens.
  • To elucidate the molecular mechanisms driving these inter-bacterial interactions.
  • To examine host-specific factors influencing these pathogen dynamics.

Main Methods:

  • Literature review of studies on Pseudomonas aeruginosa and Staphylococcus aureus interactions.
  • Analysis of research on molecular mechanisms of bacterial cooperation and competition.
  • Synthesis of findings on host-pathogen interactions in polymicrobial settings.

Main Results:

  • Bacterial interactions significantly modulate virulence and disease progression.
  • Specific molecular pathways govern the interplay between these pathogens.
  • Host factors critically shape the outcome of polymicrobial infections.

Conclusions:

  • Understanding Pseudomonas aeruginosa and Staphylococcus aureus interactions is crucial for developing effective therapies.
  • Host-specific factors are key determinants in polymicrobial infection outcomes.
  • Further research into molecular mechanisms can reveal novel therapeutic targets.

Related Concept Videos

Staphylococcal Skin Infections01:29

Staphylococcal Skin Infections

Staphylococcus aureus is a Gram-positive coccus that resides harmlessly on the skin and mucous membranes of healthy individuals. When the skin barrier is breached, it can shift from a commensal to an opportunistic pathogen. This transition is facilitated by surface adhesins, such as clumping factor B and S. aureus surface protein G (SasG), which bind to structural proteins, including loricrin and cytokeratin, in the damaged epidermis. Protein A, another key factor, binds the Fc region of...
16
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...
7
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...
37
Microbial Interactions: Cooperation01:26

Microbial Interactions: Cooperation

Microbial cooperation involves beneficial interactions in which different species work together for individual or mutual advantage. These interactions can profoundly influence ecological dynamics and evolutionary processes, and they are essential to many pathogenic and symbiotic relationships.Nematode–Bacteria CooperationA striking example is the relationship between the Gram-negative bacterium Xenorhabdus nematophila and the parasitic nematode Steinernema carpocapsae. Juvenile nematodes...
1
Combined Effects of Drugs: Synergism01:27

Combined Effects of Drugs: Synergism

Synergism is a useful mechanism where combining two or more drugs is more effective than each constituent used alone. Such combinations are also called supra-additive interactions. The drugs collectively enhance the final therapeutic effect by acting on different targets. Another advantage is that the low dose of each constituent drug is sufficient to achieve the desired effect. This helps reduce the duration of therapy and lower the adverse effects of these drugs.
Such synergistic combinations...
7.2K
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,...
857