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Related Concept Videos

Staphylococcal Skin Infections01:29

Staphylococcal Skin Infections

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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...
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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...
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Gene Regulation in Microbial Communities: Quorum Sensing01:28

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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,...
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Related Experiment Video

Updated: Apr 12, 2026

Improved Enzyme Protection Assay to Study Staphylococcus aureus Internalization and Intracellular Efficacy of Antimicrobial Compounds
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Coagulase Activity by Staphylococcus aureus: A Potential Target for Therapy?

Marijke Peetermans1, Peter Verhamme1, Thomas Vanassche1

  • 1Department of Cardiovascular Sciences, University of Leuven, Leuven, Belgium.

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Staphylococcus aureus coagulases promote infection by forming clots and adhering to blood vessels. Inhibiting these coagulases improves outcomes in various Staphylococcus aureus disease models.

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Area of Science:

  • Microbiology
  • Infectious Diseases
  • Biochemistry

Background:

  • Staphylococcus aureus is a major pathogen causing severe infections, including endocarditis.
  • The role of S. aureus's clotting ability in its virulence has been debated.
  • S. aureus secretes coagulases that activate prothrombin, generating fibrin.

Purpose of the Study:

  • To review the role of S. aureus coagulases in virulence.
  • To discuss novel therapeutic strategies targeting S. aureus coagulases.

Main Methods:

  • Review of existing literature on S. aureus coagulases and their mechanisms.
  • Analysis of studies demonstrating the impact of coagulase activity on disease models.

Main Results:

  • Coagulase activity is crucial for S. aureus-fibrin-platelet microaggregate formation.
  • Coagulase facilitates S. aureus adherence to the vascular wall under flow conditions.
  • Inhibiting coagulase activity improves outcomes in models of S. aureus skin, sepsis, catheter, and endocarditis infections.

Conclusions:

  • S. aureus manipulates the host's hemostatic system for disease progression.
  • S. aureus coagulases are promising therapeutic targets for novel anti-infective strategies.