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Updated: May 14, 2026

Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus (MRSA)
Published on: February 9, 2011
MRSA nasal colonization in children: prevalence meta-analysis, review of risk factors and molecular genetics
Francesco Gesualdo1, Dafne Bongiorno, Caterina Rizzo
1Bambino Gesù Children's Hospital, Rome, Italy. f.gesualdo@gmail.com
Background:
We report a meta-analysis of methicillin-resistant Staphylococcus aureus (MRSA) nasal colonization prevalence in children and a review of the risk factors as well as molecular genetic characterization.
Methods:
All relevant studies reporting prevalence data on MRSA nasal colonization in children published between January 2000 and August 2010 were retrieved from the MEDLINE database and analyzed.
Results:
After screening 544 studies, 50 studies were included. We obtained an estimate of MRSA prevalence of 2.7% (95% confidence interval [CI]: 2.2-3.1); of 5.2% (95% CI: 3.1-7.3) in children with underlying conditions and of 2.3% (95% CI: 1.8-2.7) in healthy children; 5.4% (95% CI: 3.1-7.7) in children recruited in hospitals and 3% (95% CI: 2.4-3.6) in children recruited in the community. Staphylococcal cassette chromosome mec type IV is the most diffused cassette globally.
Conclusion:
The hospital remains the environment where the microorganism circulates most. Children with underlying conditions could act as vectors of microorganisms between the hospital and the community. MRSA prevention strategies should be tailored to each specific institution, taking into account the nosocomial prevalence of MRSA nasal colonization and infections, and the prevalence of nasal colonization in the community that refers to the specific health care center.
Insights
Methicillin-resistant Staphylococcus aureus (MRSA) nasal colonization in children has a prevalence of 2.7%. Children with underlying conditions and hospital settings show higher MRSA prevalence, highlighting the need for tailored prevention strategies.
Area of Science:
- Pediatric Infectious Diseases
- Microbiology
- Epidemiology
Background:
- Methicillin-resistant Staphylococcus aureus (MRSA) poses a significant public health concern.
- Understanding MRSA nasal colonization in children is crucial for infection control.
- Risk factors and genetic characterization of MRSA in pediatric populations require detailed analysis.
Purpose of the Study:
- To conduct a meta-analysis on the prevalence of MRSA nasal colonization in children.
- To review associated risk factors and molecular genetic characteristics of MRSA.
- To inform public health strategies for MRSA prevention in pediatric care.
Main Methods:
- Systematic literature search of MEDLINE database for studies published between January 2000 and August 2010.
- Inclusion of studies reporting MRSA nasal colonization prevalence data in children.
- Meta-analysis and statistical analysis of retrieved data.
Main Results:
- A total of 50 studies were included after screening 544.
- Overall MRSA nasal colonization prevalence in children was estimated at 2.7%.
- Higher prevalence observed in children with underlying conditions (5.2%) and in hospital settings (5.4%) compared to healthy children (2.3%) and community settings (3%).
- Staphylococcal cassette chromosome mec type IV was identified as the most prevalent type globally.
Conclusions:
- Hospitals are primary environments for MRSA circulation.
- Children with underlying conditions may serve as vectors between hospital and community settings.
- MRSA prevention strategies must be individualized based on institutional and community-specific prevalence data.
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