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Emerg Infect Dis. 2002 Jun;8(6):602-7.

Community-acquired methicillin-resistant Staphylococcus aureus, Finland.

Author information

1
Department of Microbiology, National Public Health Institute, Helsinki, Finland. saara.salmenlinna@ktl.fi

Abstract

Methicillin-resistant Staphylococcus aureus (MRSA) is no longer only hospital acquired. MRSA is defined as community acquired if the MRSA-positive specimen was obtained outside hospital settings or within 2 days of hospital admission, and if it was from a person who had not been hospitalized within 2 years before the date of MRSA isolation. To estimate the proportion of community-acquired MRSA, we analyzed previous hospitalizations for all MRSA-positive persons in Finland from 1997 to 1999 by using data from the National Hospital Discharge Register. Of 526 MRSA-positive persons, 21% had community-acquired MRSA. Three MRSA strains identified by phage typing, pulsed-field gel electrophoresis, and ribotyping were associated with community acquisition. None of the strains were multiresistant, and all showed an mec hypervariable region hybridization pattern A (HVR type A). None of the epidemic multiresistant hospital strains were prevalent in nonhospitalized persons. Our population-based data suggest that community-acquired MRSA may also arise de novo, through horizontal acquisition of the mecA gene.

PMID:
12023917
PMCID:
PMC2738488
DOI:
10.3201/eid0806.010313
[Indexed for MEDLINE]
Free PMC Article

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