Abstract
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. 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. 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. 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.
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