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Restriction fragment length polymorphisms among the flagellar genes of the Lior heat-labile serogroup reference strains and field strains of Campylobacter jejuni and C. coli

Published online by Cambridge University Press:  15 May 2009

A. P. Burnens
Affiliation:
National Reference Laboratory for Foodborne Diseases, University of Berne, Länggass-Str. 122, CH-3012 Berne, Switzerland
J. Wagner
Affiliation:
National Reference Laboratory for Foodborne Diseases, University of Berne, Länggass-Str. 122, CH-3012 Berne, Switzerland
H. Lior
Affiliation:
Laboratory Centre for Disease Control, Tunney's Pasture, Ottawa, Ontario K1A 0L2, Canada
J. Nicolet
Affiliation:
National Reference Laboratory for Foodborne Diseases, University of Berne, Länggass-Str. 122, CH-3012 Berne, Switzerland
J. Frey
Affiliation:
National Reference Laboratory for Foodborne Diseases, University of Berne, Länggass-Str. 122, CH-3012 Berne, Switzerland
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Several typing systems have been described for Campylobacter jejuni and C. coli, to assess the complex epidemiology of these important enteric pathogens. In the present study two typing methods, slide agglutination according to the Lior scheme, and the demonstration of restriction-fragment length polymorphisms (RFLP) of flagellar genes, have been used in parallel on a set of 194 strains. This set comprised 118 sero-reference strains of C. jejuni and C. coli of the Lior scheme, as well as 76 clinical isolates. All isolates were serotyped and subjected to PCR for amplification of flagellar genes, and the PCR product was restricted with Alu I. Flagellar genes could be amplified in 152 strains. Among 85 seroreference strains, 74 different RFLP patterns were observed, and among 67 clinical isolates, there were 36 patterns. There was only limited correlation between flagellar RFLP and the Lior serogroup, and the variability of patterns in serogroups HL2 and HL4 were as marked as the variability between serogroups. Flagellar gene RFLP patterns are shown to be stable, highly discriminatory epidemiologic markers.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1995

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