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

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. METH...

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Autores principales: Di Ruscio, Francesco, Bjørnholt, Jørgen Vildershøj, Leegaard, Truls Michael, Moen, Aina E. Fossum, de Blasio, Birgitte Freiesleben
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5480993/
https://www.ncbi.nlm.nih.gov/pubmed/28640901
http://dx.doi.org/10.1371/journal.pone.0179771
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author Di Ruscio, Francesco
Bjørnholt, Jørgen Vildershøj
Leegaard, Truls Michael
Moen, Aina E. Fossum
de Blasio, Birgitte Freiesleben
author_facet Di Ruscio, Francesco
Bjørnholt, Jørgen Vildershøj
Leegaard, Truls Michael
Moen, Aina E. Fossum
de Blasio, Birgitte Freiesleben
author_sort Di Ruscio, Francesco
collection PubMed
description 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 < 70 years. INTERPRETATION: Our analysis suggests that immigration and importation, especially among persons aged < 40 years, represent important factors for the increasing notification rate of MRSA infections in Norway.
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spelling pubmed-54809932017-07-05 MRSA infections in Norway: A study of the temporal evolution, 2006-2015 Di Ruscio, Francesco Bjørnholt, Jørgen Vildershøj Leegaard, Truls Michael Moen, Aina E. Fossum de Blasio, Birgitte Freiesleben PLoS One Research Article 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 < 70 years. INTERPRETATION: Our analysis suggests that immigration and importation, especially among persons aged < 40 years, represent important factors for the increasing notification rate of MRSA infections in Norway. Public Library of Science 2017-06-22 /pmc/articles/PMC5480993/ /pubmed/28640901 http://dx.doi.org/10.1371/journal.pone.0179771 Text en © 2017 Di Ruscio et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Di Ruscio, Francesco
Bjørnholt, Jørgen Vildershøj
Leegaard, Truls Michael
Moen, Aina E. Fossum
de Blasio, Birgitte Freiesleben
MRSA infections in Norway: A study of the temporal evolution, 2006-2015
title MRSA infections in Norway: A study of the temporal evolution, 2006-2015
title_full MRSA infections in Norway: A study of the temporal evolution, 2006-2015
title_fullStr MRSA infections in Norway: A study of the temporal evolution, 2006-2015
title_full_unstemmed MRSA infections in Norway: A study of the temporal evolution, 2006-2015
title_short MRSA infections in Norway: A study of the temporal evolution, 2006-2015
title_sort mrsa infections in norway: a study of the temporal evolution, 2006-2015
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5480993/
https://www.ncbi.nlm.nih.gov/pubmed/28640901
http://dx.doi.org/10.1371/journal.pone.0179771
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