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Journal of Bacteriology, April 2001, p. 2553-2559, Vol. 183, No. 8
Institut für Hygiene und Mikrobiologie
der Universität Würzburg, D-97080
Würzburg,1 and Institut für
Medizinische Mikrobiologie und Hygiene der Universität Freiburg,
D-79104 Freiburg,2 Germany
Received 12 September 2000/Accepted 29 January 2001
The allelic diversity and population structure of
Campylobacter jejuni were studied by multilocus
nucleotide sequence analysis. Sequences from seven housekeeping genes
were obtained from 32 C. jejuni isolates isolated from
enteritis patients in Germany, Hungary, Thailand, and the United
States. Also included was strain NCTC 11168, the complete genomic
sequence of which has recently been published. For all loci analyzed,
multiple strains carried identical alleles. The frequency of synonymous
and nonsynonymous sequence polymorphisms was low. The number of unique
alleles per locus ranged from 9 to 15. These alleles occurred in 31 different combinations (sequence types), so that all but two pairs of
strains could be distinguished from each other. Sequences were analyzed for evidence of recombination by the homoplasy test and split decomposition. These analyses showed that intraspecific recombination is frequent in C. jejuni and has generated extensive
diversity of allelic profiles from a small number of polymorphic nucleotides.
0021-9193/01/$04.00+0 DOI: 10.1128/JB.183.8.2553-2559.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.
Allelic Diversity and Recombination in
Campylobacter jejuni
*
Corresponding author. Mailing address: Institut
für Hygiene und Mikrobiologie der Universität
Würzburg, Josef-Schneider-Stra
e 2, D-97080 Würzburg,
Germany. Phone: 49 931 201 3949. Fax: 49 931 201 3445. E-mail:
ssuerbaum{at}hygiene.uni-wuerzburg.de.
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