Environmental contamination due to methicillin-resistant Staphylococcus aureus: possible infection control...

Area of Science:

• Infection Control and Hospital Epidemiology
• Microbiology
• Public Health

Background:

• Methicillin-resistant Staphylococcus aureus (MRSA) is a significant healthcare-associated pathogen.
• Understanding reservoirs for MRSA transmission is crucial for effective infection control strategies.
• Environmental contamination plays a potential role in the spread of multidrug-resistant organisms.

Purpose of the Study:

• To investigate the extent to which environmental surfaces in hospital rooms serve as reservoirs for MRSA.
• To determine the association between patient colonization/infection site and environmental contamination levels.
• To assess the potential for healthcare personnel to acquire MRSA from contaminated surfaces.

Main Methods:

• Prospective culture survey of inanimate objects in rooms of patients with endemic MRSA.
• Sampling conducted in a 200-bed university-affiliated teaching hospital.
• Inclusion of 38 consecutive patients colonized or infected with MRSA.

Main Results:

• 27% of 350 sampled surfaces were contaminated with MRSA.
• Contamination was significantly higher when MRSA was present in wounds or urine (36%) compared to other sites (6%).
• Frequently contaminated items included floors, bed linens, gowns, overbed tables, and blood pressure cuffs.

Conclusions:

• Inanimate environmental surfaces in proximity to MRSA-affected patients are commonly contaminated.
• The body site of MRSA colonization or infection influences the frequency of environmental contamination.
• Contaminated surfaces pose a risk for MRSA transmission to healthcare personnel, suggesting a role as a reservoir.