Control of methicillin-resistant Staphylococcus aureus in a burn unit: role of nurse staffing

Area of Science:

• Infectious Diseases
• Hospital Epidemiology
• Burn Care Management

Background:

• Methicillin-resistant Staphylococcus aureus (MRSA) poses a significant threat in healthcare settings, particularly in specialized units like burn centers.
• Previous control measures, including barrier precautions and topical antibiotic treatment for personnel, were insufficient to halt MRSA transmission in this burn unit.

Purpose of the Study:

• To retrospectively investigate the transmission dynamics of MRSA within a burn unit.
• To identify key risk factors and transmission routes contributing to MRSA acquisition among burn patients.
• To evaluate the effectiveness of implemented control measures in eradicating MRSA.

Main Methods:

• Retrospective analysis of MRSA colonization and infection data over an 8-month period.
• Case-control study to identify host risk factors for MRSA colonization.
• Correlation analysis of environmental and staffing factors with new MRSA cases.
• Environmental sampling to assess MRSA contamination levels.

Main Results:

• 34% of patients acquired MRSA during the study period, indicating ongoing transmission.
• Burn size was identified as a major host risk factor for MRSA colonization.
• Increased patient load and the use of temporary or overtime nursing staff were significantly associated with new MRSA cases (p = 0.001).
• Environmental sampling revealed minimal MRSA colonies, suggesting personnel as the primary transmission vector.

Conclusions:

• Contact transmission involving healthcare personnel is a primary driver of MRSA spread in burn units.
• Specific nurse staffing strategies, such as assigning dedicated nurses to colonized patients, are crucial for effective MRSA outbreak control.
• Nurse staffing variables significantly influence MRSA persistence and eradication, highlighting the importance of optimized staffing in infection prevention.