USA300 methicillin-resistant Staphylococcus aureus in Norway

Area of Science:

• Microbiology
• Infectious Diseases
• Epidemiology

Background:

• Community-associated methicillin-resistant Staphylococcus aureus (CA-MRSA) USA300 is a globally disseminated clone.
• Understanding the establishment and prevalence of specific MRSA strains is crucial for public health.

Purpose of the Study:

• To investigate the presence and endemic establishment of the USA300 MRSA strain in Norway.
• To track the incidence of USA300 MRSA in relation to overall MRSA trends.

Main Methods:

• Utilized strain typing techniques including spa-, SCCmec-, and dru-typing.
• Employed pulsed-field gel electrophoresis (PFGE) and molecular marker detection (lukS/F-PV, arcA).

Main Results:

• USA300 MRSA has been present in the studied Norwegian region since 2003.
• The incidence of USA300 MRSA has risen in parallel with the total MRSA incidence.
• Isolates were predominantly found in the community, with some detected in healthcare settings.

Conclusions:

• The USA300 MRSA clone is established and increasing in Norway.
• Surveillance for CA-MRSA strains is important in both community and healthcare environments.