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MRSA infections in Norway: A study of the temporal evolution, 2006-2015

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  • Francesco Di Ruscio
  • Jørgen Vildershøj Bjørnholt
  • Truls Michael Leegaard
  • Aina E Fossum Moen
  • Birgitte Freiesleben de Blasio

Abstract

Background: Norway has one of the lowest prevalences of methicillin-resistant Staphylococcus aureus (MRSA) infections in the world. This study exploits the extensive data on MRSA infections in the Norwegian surveillance system to investigate the important factors defining the MRSA epidemiology. Methods: We performed a quasi-Poisson regression of the monthly notification rate (NR) of MRSA infections reported from January 2006 to December 2015, comparing the time trend among people with an immigrant vs. Norwegian background and domestic vs. imported infections, stratified by age groups. Findings: A total of 5289 MRSA infections were reported during the study period, of which 2255 (42·6%) were acquired in Norway, 1370 (25·9%) abroad, and 1664 (31·5%) with an unknown place of acquisition. Overall, the monthly NR increased significantly from 2006 to 2015 (+0·8% each month). The monthly increase in immigrants (+1·3%) was steeper than that in people with a Norwegian background (+0·6%). There was a significant growth (+0·4%) in the rate of domestically acquired infections, however, the NR of infections acquired abroad increased faster (+0·8%). For both imported and domestic infections, the increase occurred in persons aged

Suggested Citation

  • Francesco Di Ruscio & Jørgen Vildershøj Bjørnholt & Truls Michael Leegaard & Aina E Fossum Moen & Birgitte Freiesleben de Blasio, 2017. "MRSA infections in Norway: A study of the temporal evolution, 2006-2015," PLOS ONE, Public Library of Science, vol. 12(6), pages 1-15, June.
    • Handle: RePEc:plo:pone00:0179771
    DOI: 10.1371/journal.pone.0179771
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    References listed on IDEAS

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    1. John F Moxnes & Birgitte Freiesleben de Blasio & Truls Michael Leegaard & Aina E Fossum Moen, 2013. "Methicillin-Resistant Staphylococcus aureus (MRSA) Is Increasing in Norway: A Time Series Analysis of Reported MRSA and Methicillin-Sensitive S. aureus Cases, 1997–2010," PLOS ONE, Public Library of Science, vol. 8(8), pages 1-12, August.
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