Related Experiment Video
Updated: Jun 15, 2026

Multiplex PCR Assay for Typing of Staphylococcal Cassette Chromosome Mec Types I to V in Methicillin-resistant Staphylococcus aureus
Published on: September 5, 2013
Community-associated meticillin-resistant Staphylococcus aureus
Frank R DeLeo1, Michael Otto, Barry N Kreiswirth
1Laboratory of Human Bacterial Pathogenesis, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT 59840, USA. fdeleo@niaid.nih.gov
Abstract:
Meticillin-resistant Staphylococcus aureus (MRSA) is endemic in hospitals worldwide, and causes substantial morbidity and mortality. Health-care-associated MRSA infections arise in individuals with predisposing risk factors, such as surgery or presence of an indwelling medical device. By contrast, many community-associated MRSA (CA-MRSA) infections arise in otherwise healthy individuals who do not have such risk factors. Additionally, CA-MRSA infections are epidemic in some countries. These features suggest that CA-MRSA strains are more virulent and transmissible than are traditional hospital-associated MRSA strains. The restricted treatment options for CA-MRSA infections compound the effect of enhanced virulence and transmission. Although progress has been made towards understanding emergence of CA-MRSA, virulence, and treatment of infections, our knowledge remains incomplete. Here we review the most up-to-date knowledge and provide a perspective for the future prophylaxis or new treatments for CA-MRSA infections.
Insights
Community-associated MRSA (CA-MRSA) infections are increasingly prevalent and virulent, often affecting healthy individuals. This review highlights current knowledge and future directions for CA-MRSA prophylaxis and treatment.
Area of Science:
- Infectious Diseases
- Microbiology
- Public Health
Background:
- Meticillin-resistant Staphylococcus aureus (MRSA) is a global health concern, causing significant illness and death.
- Health-care-associated MRSA infections typically affect patients with risk factors like surgery or devices.
- Community-associated MRSA (CA-MRSA) infections occur in healthy individuals, suggesting increased virulence and transmissibility.
Purpose of the Study:
- To review current knowledge on the emergence, virulence, and treatment of CA-MRSA infections.
- To provide insights into future prophylaxis and novel treatment strategies for CA-MRSA.
Main Methods:
- Literature review of recent studies on CA-MRSA.
- Synthesis of information on epidemiology, clinical features, and treatment options.
- Analysis of factors contributing to CA-MRSA emergence and spread.
Main Results:
- CA-MRSA strains exhibit enhanced virulence and transmissibility compared to hospital-associated strains.
- Limited treatment options exacerbate the challenge of managing CA-MRSA infections.
- Despite progress, a comprehensive understanding of CA-MRSA remains incomplete.
Conclusions:
- Further research is crucial to understand the unique characteristics of CA-MRSA.
- Development of effective prophylaxis and new therapeutic interventions is urgently needed.
- Addressing the growing threat of CA-MRSA requires a multi-faceted approach.
Related Concept Videos
Clinical Significance of Antibiotic Resistance
Staphylococcal Skin Infections
Mechanism of Antibiotic Resistance in MRSA
Defense Against Bacterial Pathogens
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 Skin Microbiota
