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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...
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...
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...
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 acquisition...
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...
Microorganisms in Medicine and Therapeutics01:29

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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Updated: May 24, 2026

Evaluating the Immune Response of a Nanoemulsion Adjuvant Vaccine Against Methicillin-Resistant Staphylococcus aureus (MRSA) Infection
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Evaluating the Immune Response of a Nanoemulsion Adjuvant Vaccine Against Methicillin-Resistant Staphylococcus aureus (MRSA) Infection

Published on: September 1, 2023

Challenges for a universal Staphylococcus aureus vaccine.

Richard A Proctor1

  • 1Departments of Medical Microbiology/Immunology and Medicine, University of Wisconsin School of Medicine and Public Health School, Madison, USA. rap@facstaff.wisc.edu

Clinical Infectious Diseases : an Official Publication of the Infectious Diseases Society of America
|February 23, 2012
PubMed
Summary
This summary is machine-generated.

Staphylococcal vaccine trials failed due to a lack of understanding of protective immunity. Future vaccines must consider cell-mediated immunity, not just antibodies, for Staphylococcus aureus infections.

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Evaluating the Immune Response of a Nanoemulsion Adjuvant Vaccine Against Methicillin-Resistant Staphylococcus aureus (MRSA) Infection
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Development and Assessment of Intracellular Infection Models for Staphylococcus aureus
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Development and Assessment of Intracellular Infection Models for Staphylococcus aureus

Published on: January 17, 2025

Area of Science:

  • Immunology
  • Vaccinology
  • Microbiology

Background:

  • Staphylococcus aureus infections pose a significant global health challenge.
  • Previous vaccine development efforts for S. aureus have faced setbacks.
  • Understanding protective immunity is crucial for effective vaccine design.

Purpose of the Study:

  • To review reasons for the failure of staphylococcal vaccine trials.
  • To analyze new information on protective immunity against S. aureus.
  • To identify challenges and guide future vaccine development.

Main Methods:

  • Literature review of clinical trials and vaccine candidates.
  • Analysis of recent findings on immune responses to S. aureus.
  • Evaluation of immunological biomarkers and correlates of protection.

Main Results:

  • Protective immunity involves cell-mediated immunity, particularly T-helper 17 cells and interleukin 17.
  • Specific antibodies alone do not confer adequate protection against S. aureus.
  • A significant challenge is the absence of a reliable biomarker for predicting vaccine-induced protection.

Conclusions:

  • Past vaccine trials may have failed due to an overemphasis on antibody-mediated immunity.
  • Future S. aureus vaccine strategies should incorporate cell-mediated immune responses.
  • Development of a universal S. aureus vaccine requires addressing the lack of predictive biomarkers.