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Applied and Environmental Microbiology, October 2000, p. 4555-4558, Vol. 66, No. 10
0099-2240/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.
Rapid and Simple Determination of the
Escherichia coli Phylogenetic Group
Olivier
Clermont,
Stéphane
Bonacorsi, and
Edouard
Bingen*
Laboratoire d'études de génétique
bactérienne dans les infections de l'enfant (EA3105),
Université Denis Diderot-Paris 7, Hôpital Robert
Debré, Paris, France
Received 15 February 2000/Accepted 7 July 2000
Phylogenetic analysis has shown that Escherichia coli
is composed of four main phylogenetic groups (A, B1, B2, and D) and that virulent extra-intestinal strains mainly belong to groups B2 and
D. Actually, phylogenetic groups can be determined by multilocus enzyme
electrophoresis or ribotyping, both of which are complex, time-consuming techniques. We describe a simple and rapid phylogenetic grouping technique based on triplex PCR. The method, which uses a
combination of two genes (chuA and yjaA) and an
anonymous DNA fragment, was tested with 230 strains and showed
excellent correlation with reference methods.
*
Corresponding author. Mailing address: Service de
Microbiologie, Hôpital Robert Debré, 48 blvd.
Sérurier, 75395 Paris cedex 19, France. Phone: 33 1 40 03 23 40. Fax: 33 1 40 03 24 50. E-mail: edouard.bingen{at}rdb.ap-hop-paris.fr.
Applied and Environmental Microbiology, October 2000, p. 4555-4558, Vol. 66, No. 10
0099-2240/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.
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