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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
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...
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...
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...
Determinants of Bacterial Pathogenicity and Virulence01:20

Determinants of Bacterial Pathogenicity and Virulence

Pathogenic bacteria employ a variety of strategies to establish infections, including the secretion of extracellular enzymes that act as potent virulence factors. These enzymes facilitate bacterial colonization of host tissues and help evade immune surveillance. By targeting structural components of host tissues and interfering with immune mechanisms, these enzymes play a pivotal role in disease progression.Extracellular Enzymes Facilitating Tissue Invasion: Several bacterial pathogens secrete...
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...

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Updated: Jun 12, 2026

Development and Assessment of Intracellular Infection Models for Staphylococcus aureus
08:32

Development and Assessment of Intracellular Infection Models for Staphylococcus aureus

Published on: January 17, 2025

Staphylococcus aureus: An old pathogen with new weapons.

Yi-Wei Tang1, Charles W Stratton

  • 1Department of Pathology and Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232, USA. yiwei.tang@vanderbilt.edu <yiwei.tang@vanderbilt.edu>

Clinics in Laboratory Medicine
|June 2, 2010
PubMed
Summary
This summary is machine-generated.

Staphylococcus aureus remains a significant pathogen due to evolving resistance and virulence. Rapid molecular identification of these traits is crucial for reducing infection-related deaths and illness.

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Improved Enzyme Protection Assay to Study Staphylococcus aureus Internalization and Intracellular Efficacy of Antimicrobial Compounds
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Improved Enzyme Protection Assay to Study Staphylococcus aureus Internalization and Intracellular Efficacy of Antimicrobial Compounds

Published on: September 8, 2021

Related Experiment Videos

Last Updated: Jun 12, 2026

Development and Assessment of Intracellular Infection Models for Staphylococcus aureus
08:32

Development and Assessment of Intracellular Infection Models for Staphylococcus aureus

Published on: January 17, 2025

Improved Enzyme Protection Assay to Study Staphylococcus aureus Internalization and Intracellular Efficacy of Antimicrobial Compounds
06:36

Improved Enzyme Protection Assay to Study Staphylococcus aureus Internalization and Intracellular Efficacy of Antimicrobial Compounds

Published on: September 8, 2021

Area of Science:

  • Microbiology
  • Infectious Diseases
  • Molecular Diagnostics

Background:

  • Staphylococcus aureus is a persistent and adaptable human pathogen responsible for numerous infections.
  • The bacterium exhibits evolving resistance mechanisms and virulence factors, posing a significant public health challenge.
  • Understanding these adaptations is critical for managing S. aureus infections in the 21st century.

Purpose of the Study:

  • To review the emerging aspects of Staphylococcus aureus infections.
  • To highlight the importance of rapid molecular identification of resistance and virulence factors.

Main Methods:

  • This article provides a comprehensive review of existing literature on Staphylococcus aureus.
  • It synthesizes information on the pathogen's microbiology, epidemiology, pathogenesis, and clinical manifestations.
  • Diagnostic, treatment, and prognostic aspects, along with host immunity, are also addressed.

Main Results:

  • Staphylococcus aureus continues to be a leading cause of human infections globally.
  • Its adaptability in resistance and virulence necessitates updated diagnostic and therapeutic strategies.
  • Molecular identification methods offer promising avenues for improved patient outcomes.

Conclusions:

  • Staphylococcus aureus infections pose a continuing threat due to the pathogen's adaptability.
  • Rapid molecular identification of S. aureus resistance and virulence factors is essential for clinical decision-making.
  • Effective management requires a multidisciplinary approach encompassing microbiology, diagnostics, and treatment.