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Journal of Clinical Microbiology, September 1999, p. 2798-2803, Vol. 37, No. 9
Unidade de Genética Molecular,
Received 26 March 1999/Returned for modification 4 May
1999/Accepted 3 June 1999
Molecular surveillance studies have documented the extensive spread
of methicillin-resistant Staphylococcus aureus (MRSA) clones. Studies carried out by Centro de Epidemiologia
Molecular-Network for Tracking Gram-Positive Pathogenic Bacteria
(CEM/NET) led to the identification of two international
multidrug-resistant strains, which were designated as the Iberian and
Brazilian MRSA clones and which were defined by multiple genomic typing
methods; these included ClaI restriction digests hybridized
with mecA- and Tn554-specific DNA probes and
pulsed-field gel electrophoresis (PFGE). The genotypic characteristics
of these clones are distinct: the Iberian clone is defined as
mecA type I, Tn554 type E (or its variants),
and PFGE pattern A (I:E:A), whereas the Brazilian clone is defined as
mecA type XI (or its variants), Tn554 type B,
and PFGE pattern B (XI:B:B). In this study, we characterized 59 single-patient isolates of MRSA collected during 1996 and 1997 at seven
hospitals located in Prague and five other cities in the Czech Republic by using the methodologies mentioned above and by using ribotyping of
EcoRI and HindIII digests hybridized with a
16S-23S DNA probe. The Brazilian MRSA clone (XI:B:B) was the major
clone (80%) spread in two hospitals located in Prague and one located
in Brno; the Iberian MRSA clone (I:E:A or its variant I:DD:A), although
less representative (12%), was detected in two hospitals, one in
Prague and the other in Plzen. Almost all the strains belonging to
clone XI:B:B (45 of 47) corresponded to a unique ribotype, E1H1,
whereas most strains of the I:E:A and I:DD:A clonal types (6 of 7)
corresponded to ribotype E2H2.
0095-1137/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
Methicillin-Resistant Staphylococcus
aureus Clonal Types in the Czech Republic
*
Corresponding author. Mailing address: The Rockefeller
University, 1230 York Ave., New York, NY 10021. Phone: (212) 327-8278. Fax: (212) 327-8688. E-mail:
lencash{at}rockvax.rockefeller.edu.
Journal of Clinical Microbiology, September 1999, p. 2798-2803, Vol. 37, No. 9
0095-1137/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
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