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Journal of Clinical Microbiology, January 1999, p. 103-109, Vol. 37, No. 1
0095-1137/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
Typing of Listeria monocytogenes Strains
by Repetitive Element Sequence-Based PCR
B.
Jer
ek,1,*
P.
Gilot,2
M.
Gubina,3
N.
Klun,4
J.
Mehle,5
E.
Tcherneva,6
N.
Rijpens,1 and
L.
Herman1
Centre of Agricultural Research, Department
of Animal Product Quality (DVK), B-9090
Melle,1 and
National Reference
Center for Listeriosis, Institute of Hygiene and Epidemiology,
B-1050 Brussels,2 Belgium;
Medical
Faculty, Institute of Microbiology3 and
Veterinary Faculty,5 University of
Ljubljana, and
Department of Sanitary Microbiology, Institute
of Public Health of the Republic of
Slovenia,4 1000 Ljubljana, Slovenia; and
Central Veterinary Research Institute, 1606 Sofia,
Bulgaria6
Received 28 May 1998/Returned for modification 24 July
1998/Accepted 21 October 1998
Listeria monocytogenes strains possess short repetitive
extragenic palindromic (REP) elements and enterobacterial
repetitive intergenic consensus (ERIC) sequences. We used repetitive
element sequence-based PCR (rep-PCR) to evaluate the potential of REP and ERIC elements for typing L. monocytogenes strains
isolated from humans, animals, and foods. On the basis of rep-PCR
fingerprints, L. monocytogenes strains were divided into
four major clusters matching origin of isolation. rep-PCR fingerprints
of human and animal isolates were different from those of food
isolates. Computer evaluation of rep-PCR fingerprints allowed
discrimination among the tested serotypes 1/2a, 1/2b, 1/2c, 3b, and 4b
within each major cluster. The index of discrimination calculated for
52 epidemiologically unrelated isolates of L. monocytogenes
was 0.98 for REP- and ERIC-PCR. Our results suggest that rep-PCR can
provide an alternative method for L. monocytogenes typing.
*
Corresponding author. Present address: Biotechnical
Faculty, University of Ljubljana, Jamnikarjeva 101, 1000 Ljubljana, Slovenia. Phone: 386-61-1231161. Fax:
386-61-266296. E-mail: Barbara.Jersek{at}BF.UNI-LJ.SI.
Journal of Clinical Microbiology, January 1999, p. 103-109, Vol. 37, No. 1
0095-1137/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
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