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Updated: Aug 14, 2025

Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus MRSA
Published on: February 9, 2011
Reducing MRSA Infection in a New NICU During the COVID-19 Pandemic
Renee E Barrett1, Noa Fleiss1, Caitlin Hansen1
1Yale School of Medicine, New Haven, Connecticut.
A quality improvement initiative significantly reduced invasive Methicillin-resistant Staphylococcus aureus (MRSA) infections in a neonatal intensive care unit (NICU). These efforts successfully eliminated new MRSA infections for over two years, even during the COVID-19 pandemic.
Area of Science:
- Neonatal Intensive Care Unit (NICU) infection control
- Public health and epidemiology
- Healthcare quality improvement
Background:
- Methicillin-resistant Staphylococcus aureus (MRSA) poses a significant risk for hospitalized neonates, leading to colonization and invasive infections.
- The impact of infection control interventions on MRSA in NICUs during the COVID-19 pandemic remains understudied.
Purpose of the Study:
- To assess the effectiveness of infection prevention strategies in reducing invasive MRSA infections within a level IV NICU.
- To evaluate the influence of the COVID-19 pandemic on MRSA infection rates and intervention outcomes.
Main Methods:
- A 24-month quality improvement initiative utilizing the Institute for Healthcare Improvement's Model for Improvement.
- Monthly tracking of invasive MRSA infections and process measures (environmental disinfection, personnel hygiene) using control charts.
- Monitoring of the COVID-19 pandemic's impact, including visitation restrictions and heightened hygiene awareness.
Main Results:
- Invasive MRSA infections decreased from 0.131 to 0 per 1000 patient days, a reduction sustained for 30 months.
- A subsequent decrease in MRSA colonization rates was observed.
- Policy and practice changes in personnel hygiene and environmental cleaning were key contributing factors.
Conclusions:
- Multidisciplinary quality improvement initiatives can significantly decrease invasive MRSA infections in NICUs.
- Effective infection prevention strategies can be maintained even amidst the challenges of a global pandemic like COVID-19.
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