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Journal of Clinical Microbiology, February 1999, p. 342-349, Vol. 37, No. 2
0095-1137/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
Molecular Genotyping of Staphylococcus
aureus Strains: Comparison of Repetitive Element
Sequence-Based PCR with Various Typing Methods and Isolation of
a Novel Epidemicity Marker
Anneke
van der
Zee,1,*
Harold
Verbakel,1
Johan-Carlo
van Zon,1
Ine
Frenay,2
Alex
van
Belkum,3
Marcel
Peeters,1
Anton
Buiting,1 and
Anneke
Bergmans1
Laboratory of Medical Microbiology, St.
Elisabeth Hospital, 5000 AS Tilburg,1
Regional Laboratory of Medical Microbiology, 3300 AW
Dordrecht,2 and
Erasmus Medical Center
Rotterdam, Department of Medical Microbiology and Infectious
Diseases, 3015 GD Rotterdam,3 The Netherlands
Received 28 April 1998/Returned for modification 12 June
1998/Accepted 2 November 1998
Repetitive sequence-based (Rep)-PCR genotyping as described here is
based on the presence of homologues of Mycoplasma
pneumoniae repeat-like elements in Staphylococcus. In
this study we comparatively evaluated the usefulness of rep-PCR typing
with two sets of well-defined collections of Staphylococcus
aureus strains. Rep-PCR analysis of the first collection of
S. aureus strains (n = 59) and one Staphylococcus intermedius strain showed 14 different
rep-PCR patterns, with each pattern harboring 6 to 15 DNA fragments.
The discriminatory power of rep-PCR typing compared well to those of
arbitrarily primed PCR (average of 20 types) and pulsed-field gel
electrophoresis (11 types). S. aureus strain collection I comprised four outbreak-related groups of isolates. The isolates in
only one group were found to have identical rep-PCR profiles. However,
in an analysis of isolates from three additional independent local
outbreaks (n for outbreaks 1 and 2 = 5, n
for outbreak 3 = 12), identical rep-PCR types were found among
strains isolated during each outbreak. Therefore, we conclude that
rep-PCR genotyping may be an easy and fast method for monitoring of the
epidemiology of nosocomial Staphylococcus infections.
Rep-PCR analysis of strain collection II, which consisted of epidemic
and nonepidemic methicillin-resistant S. aureus (MRSA)
strains, revealed that a cluster of similar rep-PCR profiles was found
among MRSA isolates which were more frequently isolated and which were
most often associated with outbreaks.
*
Corresponding author. Mailing address: Laboratory of
Medical Microbiology, St. Elisabeth Hospital, P.O. Box 747, 5000 AS
Tilburg, The Netherlands. Phone: 31 13 539 2676. Fax: 31 13 544 1264. E-mail: lab.med.microbiol{at}inter.NL.net.
Journal of Clinical Microbiology, February 1999, p. 342-349, Vol. 37, No. 2
0095-1137/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
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