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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...
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...
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...
Asepsis01:28

Asepsis

The condition of being free from disease-causing living pathogens is asepsis. Aseptic techniques include a set of standard practices to achieve asepsis. An example is the regular environmental cleaning of all parts of the healthcare facility and hand hygiene at home before preparing or eating food. Medical and surgical asepsis in healthcare practice protects patients from harmful pathogens, minimizes the risk of contamination of susceptible sites, and reduces the risk of infection transmission.
Healthcare Associated Infections I: Iatrogenic, Exogenic and Endogenic01:26

Healthcare Associated Infections I: Iatrogenic, Exogenic and Endogenic

Healthcare-associated infections (HAIs) occur in a healthcare facility while a person receives care for another ailment. This category also includes work-related infections among healthcare staff.
HAIs significantly increase the cost of health care. Extended stays in healthcare institutions, increased disability, increased costs of medications, including specialized antibiotics, and prolonged recovery times add to the patient's expenses and the healthcare institution and funding bodies. Common...

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Related Experiment Video

Updated: May 17, 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: the enduring pathogen in surgery.

Hilary Humphreys1

  • 1Department of Clinical Microbiology, The Royal College of Surgeons, Dublin 9, Ireland. hhumphreys@rcsi.ie

The Surgeon : Journal of the Royal Colleges of Surgeons of Edinburgh and Ireland
|October 20, 2012
PubMed
Summary
This summary is machine-generated.

Staphylococcus aureus causes surgical site and bloodstream infections. While MRSA rates decline, evolving bacterial adaptability poses future challenges for healthcare-associated infection control.

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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: May 17, 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:

  • Medical Microbiology
  • Infectious Diseases
  • Public Health

Background:

  • Staphylococcus aureus is a common bacterium colonizing the respiratory tract and skin.
  • S. aureus is a leading cause of surgical site infections (SSI) and bloodstream infections (BSI).
  • Infection development involves bacterial virulence factors and host susceptibility, such as diabetes mellitus.

Purpose of the Study:

  • To review the epidemiology and challenges of Staphylococcus aureus infections, particularly healthcare-associated infections (HCAI).
  • To discuss the evolving nature of S. aureus, including antimicrobial resistance and adaptation.
  • To highlight future strategies for controlling S. aureus infections in healthcare settings.

Main Methods:

  • Literature review and synthesis of current data on S. aureus epidemiology.
  • Analysis of trends in methicillin-resistant S. aureus (MRSA) and methicillin-susceptible S. aureus (MSSA) infections.
  • Discussion of genomic adaptation and its implications for infection control.

Main Results:

  • Surveillance of SSI and BSI are key components of national quality programs to reduce HCAI.
  • While MRSA-related BSI proportions have decreased, MSSA infections remain a concern.
  • The adaptability of the S. aureus genome presents ongoing challenges, including potential for community-acquired MRSA endemicity.

Conclusions:

  • Continued surveillance and understanding of S. aureus adaptability are crucial for infection control.
  • Future strategies will likely involve advanced detection technologies and enhanced local/national efforts.
  • Good surgical practices, education, audit, and new technologies are essential for managing staphylococcal infections.