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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...
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
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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...
Regulation of Bacterial Virulence01:28

Regulation of Bacterial Virulence

Pathogenic bacteria employ a range of regulatory mechanisms to modulate the expression of virulence genes in response to environmental and host-derived signals. These mechanisms ensure that virulence factors are expressed only under favorable conditions, thereby optimizing infection and survival strategies.Mechanisms of Virulence RegulationKey regulatory strategies include:Two-Component Systems: These consist of a membrane-bound sensor kinase and a cytoplasmic response regulator. Environmental...
Vaccine Production01:23

Vaccine Production

Vaccine production involves a sequence of upstream and downstream processes to generate a safe and effective immunological product. It begins with cultivating microorganisms, such as viruses or bacteria, to obtain antigenic material. For viral vaccines, mammalian host cells are grown in bioreactors and subsequently infected with the target virus. The virus replicates within the host cells, which are lysed to release viral particles. This lysate is then clarified through filtration or...
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Microorganisms in Medicine and Therapeutics

Microorganisms play a fundamental role in vaccine development, gene therapy, and therapeutic production. Their biological properties are harnessed to advance medicine and public health. Beyond immunization, microorganisms contribute to gut health, antibiotic synthesis, and genetic disease treatment.Live Attenuated and Inactivated VaccinesLive attenuated vaccines, such as the measles, mumps, and rubella (MMR) vaccine, utilize weakened forms of pathogens to closely resemble natural infections.

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A Fluorescence-based Method to Study Bacterial Gene Regulation in Infected Tissues
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Published on: February 19, 2019

Exploring Staphylococcus aureus pathways to disease for vaccine development.

Andrea DeDent1, Hwan Keun Kim, Dominique Missiakas

  • 1Department of Microbiology, University of Chicago, 920 East 58th Street, Chicago, IL 60637, USA.

Seminars in Immunopathology
|December 2, 2011
PubMed
Summary

Staphylococcus aureus causes infections by acquiring iron, promoting clotting, and evading immunity. Vaccine development faces challenges, especially with drug-resistant strains like MRSA.

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A Fluorescence-based Method to Study Bacterial Gene Regulation in Infected Tissues
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A Tandem Liquid Chromatography&#8211;Mass Spectrometry-based Approach for Metabolite Analysis of Staphylococcus aureus
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A Tandem Liquid Chromatography–Mass Spectrometry-based Approach for Metabolite Analysis of Staphylococcus aureus

Published on: March 28, 2017

Area of Science:

  • Microbiology
  • Immunology
  • Vaccinology

Background:

  • Staphylococcus aureus is a common bacterium residing on human skin and in the nose.
  • It is a significant pathogen causing various infections, from skin issues to life-threatening sepsis.
  • Understanding S. aureus pathogenesis is crucial for developing effective treatments and vaccines.

Purpose of the Study:

  • To review the key virulence strategies of Staphylococcus aureus.
  • To explore how these strategies inform vaccine design against S. aureus infections.
  • To discuss challenges and insights from clinical trials, particularly concerning drug-resistant strains.

Main Methods:

  • Literature review of S. aureus virulence factors.
  • Analysis of host-pathogen interactions.
  • Examination of vaccine development approaches and clinical trial outcomes.

Main Results:

  • Identified three primary virulence strategies: iron scavenging, coagulation pathway induction, and immune suppression.
  • Highlighted the potential of targeting these mechanisms for vaccine development.
  • Noted the failure of current subunit vaccines and the need to address antibiotic resistance.

Conclusions:

  • Targeting S. aureus virulence factors is a promising avenue for vaccine design.
  • Future vaccine strategies must consider the rise of methicillin-resistant S. aureus (MRSA).
  • Lessons from failed trials are vital for improving future Staphylococcus aureus vaccine development.