Trends in MRSA in Finland (1997–2004)
Author Information
Author(s): Kerttula Anne-Marie, Lyytikäinen Outi, Kardén-Lilja Minna, Ibrahem Salha, Salmenlinna Saara, Virolainen Anni, Vuopio-Varkila Jaana
Primary Institution: National Public Health Institute, Helsinki, Finland
Hypothesis
What are the trends in molecular epidemiology of methicillin-resistant Staphylococcus aureus (MRSA) in Finland from 1997 to 2004?
Conclusion
The predominant MRSA strains change over time, indicating a need for ongoing control measures.
Supporting Evidence
- MRSA notifications rose from 120 in 1997 to 1458 in 2004.
- The proportion of MRSA among S. aureus blood isolates tripled from <1% to 2.8% during the study period.
- 253 different strains were identified among 4091 MRSA isolates.
Takeaway
The number of MRSA cases in Finland increased significantly from 1997 to 2004, showing that some strains are becoming more common.
Methodology
Data on MRSA notifications were analyzed, and isolates were characterized using PFGE, MLST, and SCCmec typing.
Limitations
The study could not assess health-care records or differentiate between clinical and screening specimens over the entire period.
Participant Demographics
The study included MRSA notifications from various hospital districts in Finland, covering a population of 5.2 million.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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