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Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus (MRSA)

Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus (MRSA)

Published on: February 9, 2011

Imported methicillin-resistant Staphylococcus aureus, Sweden.

Mikael Stenhem¹, Ake Ortqvist, Hakan Ringberg

¹Swedish Institute for Infectious Disease Control, Solna, Sweden.

Emerging Infectious Diseases

|February 2, 2010

Summary

Imported methicillin-resistant Staphylococcus aureus (MRSA) cases in Sweden varied by travel destination. High-risk regions correlated with community-acquired MRSA, informing targeted control strategies.

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Area of Science:

Infectious Diseases
Epidemiology
Public Health

Background:

Sweden, a low-prevalence country for methicillin-resistant Staphylococcus aureus (MRSA), provides a unique setting to study imported MRSA transmission.
Understanding the epidemiology of imported MRSA is crucial for preventing its spread in healthcare and community settings.

Purpose of the Study:

To analyze the risk and characteristics of imported MRSA cases in Sweden between 2000 and 2003.
To identify geographical and acquisition-related factors influencing MRSA transmission in travelers.

Main Methods:

Retrospective analysis of 444 imported MRSA acquisition cases reported in Sweden.
Calculation of MRSA risk per million travelers based on destination.
Correlation analysis between travel regions, acquisition type (healthcare vs. community), and MRSA strain characteristics.

Main Results:

The risk of MRSA acquisition for returning travelers varied significantly by destination, from 0.1 per million to Nordic countries to 59.4 per million to North Africa and the Middle East.
The majority of imported cases (55%) were healthcare-associated, but higher-risk travel regions showed a stronger correlation with community acquisition (r = 0.81, p = 0.001).
MRSA strains differed based on geographic origin and whether they were acquired in healthcare or community settings.

Conclusions:

Imported MRSA cases in Sweden are influenced by travel patterns and destination-specific risks.
Community acquisition is a significant factor in high-risk travel regions, necessitating tailored surveillance and control measures.
Understanding regional and acquisition-specific differences in MRSA transmission is key to improving the control of imported infections.