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Related Concept Videos

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...
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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...
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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...
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Overview
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...
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Defense Against Bacterial Pathogens

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Updated: Jun 8, 2026

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

Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus (MRSA)

Published on: February 9, 2011

Methicillin-resistant Staphylococcus aureus: the superbug.

Giuseppe Ippolito1, Sebastiano Leone, Francesco N Lauria

  • 1National Institute for Infectious Diseases Lazzaro Spallanzani, Via Portuense 293, 00149 Rome, Italy. ippolito@inmi.it

International Journal of Infectious Diseases : IJID : Official Publication of the International Society for Infectious Diseases
|September 21, 2010
PubMed
Summary
This summary is machine-generated.

Methicillin-resistant Staphylococcus aureus (MRSA) presents significant economic and health burdens. New antibiotics like linezolid, daptomycin, and tigecycline show promise for treating MRSA infections, addressing limitations of vancomycin.

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Last Updated: Jun 8, 2026

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:

  • Infectious Diseases
  • Microbiology
  • Pharmacology

Background:

  • Methicillin-resistant Staphylococcus aureus (MRSA) is a growing threat in healthcare and community settings.
  • MRSA infections incur higher hospitalization costs and indirect economic burdens compared to MSSA.
  • Evidence suggests MRSA infections are linked to increased morbidity and mortality.

Purpose of the Study:

  • To review the epidemiology, economic impact, and outcomes of MRSA infections.
  • To discuss current and emerging therapeutic options for managing MRSA infections.
  • To highlight the limitations of vancomycin and the role of newer agents.

Main Methods:

  • Literature review of epidemiological data.
  • Analysis of economic impact studies.
  • Survey of antimicrobial activity against MRSA.

Main Results:

  • MRSA infections are associated with substantial economic costs and increased patient risk.
  • Vancomycin, a primary treatment, faces limitations.
  • Linezolid, daptomycin, and tigecycline exhibit broad in vitro activity against MRSA.

Conclusions:

  • Effective management of MRSA infections requires consideration of economic and clinical outcomes.
  • Emerging antimicrobials offer valuable alternatives for MRSA treatment.
  • Continued surveillance and development of new therapies are crucial for combating MRSA.