Related Experiment Video

Updated: Mar 8, 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

1.4K

Wall teichoic acids mediate increased virulence in Staphylococcus aureus

Stefanie Wanner1, Jessica Schade1, Daniela Keinhörster1

  • 1Department of Medicine, Interfacultary Institute for Microbiology and Infection Medicine (IMIT), University of Tübingen, Elfriede-Aulhorn Straße 6, 72076 Tübingen, Germany.

Nature Microbiology
|January 24, 2017
PubMed

Insights

Community-associated methicillin-resistant Staphylococcus aureus (CA-MRSA) cause skin infections. Higher amounts of wall teichoic acid (WTA) in CA-MRSA increase virulence through a T-cell mechanism, aiding abscess formation.

Area of Science:

  • Microbiology
  • Immunology
  • Infectious Diseases

Background:

  • Community-associated methicillin-resistant Staphylococcus aureus (CA-MRSA) drives a pandemic of skin and soft tissue infections.
  • The precise mechanisms behind CA-MRSA's heightened virulence remain incompletely understood.
  • Staphylococcus aureus possesses a significant cell wall component known as wall teichoic acid (WTA).

Purpose of the Study:

  • To elucidate the role of wall teichoic acid (WTA) in the pathogenesis of CA-MRSA infections.
  • To investigate the link between WTA content and the virulence of CA-MRSA strains.
  • To explore the T-cell-mediated mechanisms underlying CA-MRSA-induced abscess formation.

Main Methods:

  • Utilized an animal model to assess skin abscess induction.
  • Quantified cell-wall-associated WTA content in various S. aureus strains.
  • Analyzed the correlation between WTA levels and abscess formation, including T-cell involvement.

Main Results:

  • A positive correlation was observed between the amount of WTA and the severity of skin abscess induction.
  • CA-MRSA strains with higher WTA content (WTAhigh) demonstrated increased abscess-forming activity compared to WTAlow strains.
  • The abscess formation was dependent on WTA and involved a T-cell-mediated pathway.

Conclusions:

  • Wall teichoic acid (WTA) is a direct contributor to the strain-specific virulence of Staphylococcus aureus.
  • The findings reveal a novel WTA-dependent, T-cell-mediated mechanism driving CA-MRSA virulence.
  • This research provides insights that could inform the development of new anti-infective strategies against CA-MRSA.

More Related Videos

A Fluorescence-based Method to Study Bacterial Gene Regulation in Infected Tissues07:10

A Fluorescence-based Method to Study Bacterial Gene Regulation in Infected Tissues

Published on: February 19, 2019

9.6K
Quantifying the Cytotoxicity of Staphylococcus aureus Against Human Polymorphonuclear Leukocytes12:27

Quantifying the Cytotoxicity of Staphylococcus aureus Against Human Polymorphonuclear Leukocytes

Published on: January 3, 2020

6.9K

Related Concept Videos

Archaeal Cell Wall01:29

Archaeal Cell Wall

Archaeal cell walls are structurally and compositionally distinct from their bacterial counterparts, lacking the characteristic peptidoglycan layer found in most bacteria. Instead, archaeal cell walls exhibit remarkable diversity, utilizing materials such as pseudomurein, polysaccharides, and proteins to construct their protective outer layers. This structural flexibility is closely tied to archaea's ecological adaptability.S-Layers: The Common Archaeal Cell WallThe S-layer is the most...
1.5K
Bacterial Cell Wall01:22

Bacterial Cell Wall

The bacterial cell wall is an essential structural component that encases the plasma membrane, preserving cellular integrity, determining shape, and protecting against osmotic stress. This rigid yet flexible structure primarily comprises peptidoglycan, a polymer that forms a mesh-like matrix conferring mechanical strength and flexibility.Peptidoglycan Composition and StructurePeptidoglycan, the core of the bacterial cell wall, comprises alternating units of N-acetylglucosamine (NAG) and...
4.9K
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,...
800
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...
3.2K
Development of Antibiotic Resistance01:30

Development of Antibiotic Resistance

Antibiotic resistance is a major public health concern that arises when bacteria evolve mechanisms to withstand the effects of antibiotic treatments. This resistance can be intrinsic, acquired through genetic mutations, or transferred between bacteria via horizontal gene transfer. The development of antibiotic resistance poses significant challenges in treating bacterial infections and necessitates ongoing research to develop new therapeutic strategies.Intrinsic resistance occurs when bacterial...
1.7K
Surface Membrane Barriers01:18

Surface Membrane Barriers

The skin and mucous membranes serve as the primary line of defense against pathogens by providing both physical and chemical protection. These barriers are essential in preventing the entry and establishment of microbes, thereby maintaining the integrity of the host.
The outer layer of the skin, the epidermis, is a robust barrier comprising layers of closely packed keratinized cells. This dense arrangement prevents microbes from penetrating the body. The periodic shedding of epidermal cells...
3.2K