Related Experiment Video

Updated: Aug 18, 2026

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

Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus (MRSA)

Published on: February 9, 2011

Community-acquired meticillin-resistant Staphylococcus aureus: an emerging threat

Nicola Zetola1, John S Francis, Eric L Nuermberger

  • 1Department of Medicine, Johns Hopkins University, Baltimore, MD 21231-1001, USA.

The Lancet. Infectious Diseases
|April 28, 2005
PubMed

Insights

Community-acquired methicillin-resistant Staphylococcus aureus (MRSA) presents a growing public health concern. New MRSA strains cause severe infections in healthy individuals, necessitating updated diagnostic and management strategies.

Area of Science:

  • Infectious Diseases
  • Microbiology
  • Public Health

Background:

  • Community-acquired methicillin-resistant Staphylococcus aureus (MRSA) is an emerging public health issue.
  • Novel S aureus strains exhibit unique virulence and resistance traits, leading to significant community morbidity and mortality.
  • Notable outbreaks include epidemic furunculosis and severe invasive pulmonary infections in young, healthy individuals.

Purpose of the Study:

  • To review the characteristics of new community-acquired MRSA strains contributing to pathogenicity.
  • To discuss novel diagnostic and management approaches for community-acquired MRSA infections.

Main Methods:

  • Literature review of recent studies on community-acquired MRSA.
  • Analysis of virulence factors and resistance mechanisms in emerging MRSA strains.
  • Synthesis of current diagnostic and therapeutic strategies.

Main Results:

  • Identification of specific virulence factors and resistance traits in pathogenic community-acquired MRSA.
  • Documentation of increased severity and incidence of infections caused by these strains.
  • Highlighting the need for advanced diagnostic tools and treatment protocols.

Conclusions:

  • Emerging community-acquired MRSA strains pose a significant threat due to enhanced pathogenicity.
  • Prompt and accurate diagnosis is crucial for effective management.
  • New therapeutic strategies are required to combat these challenging infections.

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...
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...
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...
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...
Mismatch Repair01:36

Mismatch Repair

Overview
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...