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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...
History of Microbiology01:28

History of Microbiology

Microbiology, a scientific field dedicated to the study of microorganisms, has undergone profound development since its inception in the 17th century. Its history is marked by key discoveries and technological advancements that have shaped our understanding of life at the microscopic level and transformed medicine, agriculture, and industry.Early Foundations of MicrobiologyThe early foundations of microbiology were built on groundbreaking observations and the development of pioneering...
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...
Streptococcal Pharyngitis01:27

Streptococcal Pharyngitis

Streptococcal pharyngitis, commonly known as “strep throat,” is an acute infection of the oropharyngeal tissues caused by the Gram‑positive Group A Streptococcus (Streptococcus pyogenes). Transmission occurs primarily through respiratory droplets expelled during coughing, sneezing, or talking.Mechanisms of Host Entry and Immune EvasionUpon entering the host, S. pyogenes adheres to the mucosal epithelial cells of the pharynx via surface proteins, notably lipoteichoic acid and the antiphagocytic...
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...

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Updated: Jun 26, 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

Staphylococcal infections: a historical perspective.

Henry R Shinefield1, Naomi L Ruff

  • 1University of California in San Francisco, San Francisco, CA, USA. Henryshinefield@aol.com

Infectious Disease Clinics of North America
|January 13, 2009
PubMed
Summary
This summary is machine-generated.

Staphylococcus aureus is a successful pathogen causing epidemics despite being a common commensal. Understanding its virulence and transmission is key to preventing staphylococcal disease and developing a vaccine.

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Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus (MRSA)
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Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus (MRSA)

Published on: February 9, 2011

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Last Updated: Jun 26, 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

Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus (MRSA)
12:18

Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus (MRSA)

Published on: February 9, 2011

Area of Science:

  • Microbiology
  • Infectious Diseases
  • Epidemiology

Background:

  • Staphylococcus aureus is a highly adaptable human pathogen responsible for numerous epidemics.
  • Despite its prevalence as a commensal, the mechanisms driving S. aureus epidemics remain incompletely understood.
  • The pathogen has developed resistance to all available antibiotics over the past century.

Observation:

  • S. aureus causes recurrent outbreaks in both hospital and community settings.
  • Bacterial interference strategies have shown promise in controlling outbreaks.
  • Environmental factors play a role in facilitating the spread of S. aureus.

Findings:

  • The precise mechanisms underlying S. aureus epidemic virulence are not fully elucidated.
  • Further research is needed to understand S. aureus transmission dynamics.
  • Identifying virulence and transmission mechanisms is crucial for effective intervention.

Implications:

  • A deeper understanding of S. aureus virulence could lead to novel therapeutic strategies.
  • Targeting environmental factors may help prevent staphylococcal disease spread.
  • Developing a vaccine against S. aureus is a potential long-term goal for preventing endemic and epidemic disease.