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Journal of Clinical Microbiology, November 2001, p. 3823-3829, Vol. 39, No. 11
Molecular Biology Unit, Virus Reference
Division,1 and Campylobacter
Reference Unit, Laboratory of Enteric
Pathogens,2 Central Public Health Laboratory,
London NW9 5HT, United Kingdom
Received 8 June 2001/Returned for modification 30 July
2001/Accepted 16 August 2001
The published genome sequence of Campylobacter jejuni
strain NCTC 11168 was used to model an accurate and highly reproducible fluorescent amplified fragment length polymorphism (FAFLP) analysis. Predicted and experimentally observed amplified fragments (AFs) generated with the primer pair HindIII+A and
HhaI+A were compared. All but one of the 61 predicted AFs
were reproducibly detected, and no unpredicted fragments were
amplified. This FAFLP analysis was used to genotype 74 C. jejuni strains belonging to the nine heat-stable (HS) serotypes
most prevalent in human disease in England and Wales. The 74 C. jejuni strains exhibited 60 FAFLP profiles, and cluster analysis
of them yielded a radial tree showing genetic relationships between and
within 13 major clusters. Some clusters were related, and others were
unrelated, to a single HS serotype. For example, all strains belonging
to serotypes HS6 and HS19 grouped into corresponding single genotypic
clusters, while strains of serotypes HS11 and HS18 each grouped into
two genotypic clusters. Strains of HS50, the most prevalent serotype infecting humans, were found both in one large (multiserotype) cluster
complex and dispersed throughout the tree. The strain genotypes within
each FAFLP cluster were characterized by a particular combination of
AFs, and among the cluster there were additional differential AFs.
Identification of such AFs could act as a search tool to look for
potential associations with disease or animal hosts, when applied to
large number of human isolates. Genome-sequence based FAFLP, thus, has
the potential to establish a genetic database for epidemiological
investigations of Campylobacter.
0095-1137/01/$04.00+0 DOI: 10.1128/JCM.39.11.3823-3829.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.
Genome Sequence-Based Fluorescent Amplified Fragment Length
Polymorphism of Campylobacter jejuni, Its Relationship
to Serotyping, and Its Implications for Epidemiological
Analysis
*
Corresponding author. Mailing address: Molecular
Biology Unit, Virus Reference Division, Central Public Health
Laboratory, 61 Colindale Ave., London NW9 5HT, United Kingdom. Phone:
0208 200 4400, ext. 3072. Fax: 0208 200 1569. E-mail:
mdesai{at}phls.org.uk.
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