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Updated: Apr 12, 2026

Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus MRSA
Published on: February 9, 2011
Pediatric Staphylococcus aureus Infections: Impact of Methicillin Resistance at a Canadian Center
Sergio Fanella1, Joanne Embree1
1From the Section of Pediatric Infectious Diseases, Department of Pediatrics and Child Health, University of Manitoba, Winnipeg, Manitoba, Canada.
Objectives:
Methicillin-resistant Staphylococcus aureus (MRSA) causes a wide spectrum of potentially serious infections in children. This study describes the evolving experience with S. aureus infections at a Canadian tertiary pediatric care center serving a wide geographic area.
Design:
In this two-component study, a retrospective review of infection control databases for MRSA infection was conducted, along with a prospective component for 1 year during which all community-onset S. aureus infections were identified. Cases with methicillin resistance and susceptibility were compared.
Results:
Review of infection control database records showed 239 unique infections, with steady increases over time. Common pulsed-field gel electrophoresis types included Canadian MRSA-7 and Canadian MRSA-10. During the 1-year prospective component, 210 clinical infections were identified, with MRSA isolated in 41%. Patients with MRSA were significantly younger than those with methicillin-susceptible isolates (4.9 vs 7.7 years, P < 0.001). The most common presentations were soft tissue infections in the emergency department, with a degree of inappropriate antimicrobial use.
Conclusions:
MRSA contributed to a significant proportion of S. aureus infections at a large Canadian tertiary care center. Ample opportunities exist to develop stewardship protocols, especially for the management of soft tissue infections in outpatients.
Insights
Methicillin-resistant Staphylococcus aureus (MRSA) is a growing concern in pediatric infections. This study highlights MRSA
Area of Science:
- Pediatric Infectious Diseases
- Microbiology
- Public Health
Background:
- Methicillin-resistant Staphylococcus aureus (MRSA) presents a significant challenge in pediatric healthcare.
- Understanding the epidemiology and clinical characteristics of MRSA infections is crucial for effective management.
Purpose of the Study:
- To describe the evolving trends and clinical features of Staphylococcus aureus infections, with a focus on MRSA, at a Canadian tertiary pediatric center.
- To compare characteristics of MRSA infections with methicillin-susceptible S. aureus infections.
Main Methods:
- A two-component study involving a retrospective review of infection control data and a 1-year prospective surveillance of community-onset S. aureus infections.
- Comparison of patient demographics and infection presentations between MRSA and methicillin-susceptible S. aureus cases.
Main Results:
- A steady increase in MRSA infections was observed over time.
- MRSA was identified in 41% of S. aureus infections during the prospective period.
- Patients with MRSA were younger (4.9 years) than those with methicillin-susceptible S. aureus (7.7 years).
- Soft tissue infections were the most common presentation, often associated with inappropriate antimicrobial use.
Conclusions:
- MRSA accounts for a substantial proportion of S. aureus infections in Canadian pediatric tertiary care settings.
- Opportunities exist for developing antimicrobial stewardship protocols, particularly for outpatient soft tissue infections.
Related Concept Videos
Clinical Significance of Antibiotic Resistance
Mechanism of Antibiotic Resistance in MRSA
Staphylococcal Skin Infections
Pharmacokinetics in Pediatric Patients: Drug Excretion
Pharmacokinetics in Pediatric Patients: Drug Metabolism
Development of Antibiotic Resistance

