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Related Concept Videos

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...
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...
The Oral Microbiota01:27

The Oral Microbiota

The oral microbiome includes a complex ecosystem comprising over 700 microbial species, identified through genomic sequencing and culture-based analyses to date. This community includes a core microbiome, found universally among individuals, and a variable component influenced by environmental factors such as diet, lifestyle, and host genetics. Site-specific conditions, including oxygen gradients, pH levels, and nutrient availability, determine the spatial distribution of these microorganisms...
Mismatch Repair01:36

Mismatch Repair

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Related Experiment Video

Updated: Jun 29, 2026

Biosensor for Detection of Antibiotic Resistant Staphylococcus Bacteria
14:04

Biosensor for Detection of Antibiotic Resistant Staphylococcus Bacteria

Published on: May 8, 2013

Methicillin-resistant Staphylococcus aureus: a primer for dentists.

R Monina Klevens1, Rachel J Gorwitz, Amy S Collins

  • 1Division of Viral Hepatitis, Centers for Disease Control and Prevention, Atlanta, Ga. 30333, USA. rmk2@cdc.gov

Journal of the American Dental Association (1939)
|October 4, 2008
PubMed
Summary

Methicillin-resistant Staphylococcus aureus (MRSA) causes significant infections and deaths, particularly in healthcare settings. Strict adherence to infection control is crucial in dental offices to prevent MRSA transmission.

Related Experiment Videos

Last Updated: Jun 29, 2026

Biosensor for Detection of Antibiotic Resistant Staphylococcus Bacteria
14:04

Biosensor for Detection of Antibiotic Resistant Staphylococcus Bacteria

Published on: May 8, 2013

Area of Science:

  • Infectious Diseases
  • Microbiology
  • Public Health

Background:

  • Methicillin-resistant Staphylococcus aureus (MRSA) caused an estimated 94,370 invasive infections and 18,650 deaths in the U.S. in 2005.
  • While often associated with healthcare settings, MRSA has emerged as a community pathogen, causing skin and invasive infections.
  • Understanding MRSA's history, risk factors, and infection characteristics is vital for effective control.

Purpose of the Study:

  • To describe the history and epidemiology of MRSA.
  • To identify populations at high risk for MRSA colonization and infection.
  • To compare MRSA infections in healthcare versus community settings and outline prevention strategies for dental offices.

Main Methods:

  • Literature review and analysis of CDC recommendations.
  • Epidemiological data review for MRSA infections.
  • Comparative analysis of healthcare-associated vs. community-acquired MRSA.

Main Results:

  • MRSA infections are prevalent in healthcare settings, but also occur in the community.
  • Certain populations are at higher risk for MRSA colonization and infection.
  • Specific strategies are needed to prevent MRSA transmission in dental environments.

Conclusions:

  • Standard infection control precautions are essential in all ambulatory care settings.
  • Strict enforcement of infection control in dental offices can prevent MRSA transmission.
  • Implementing evidence-based strategies is key to mitigating MRSA risks.