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Journal of Clinical Microbiology, August 2004, p. 3441-3448, Vol. 42, No. 8
0095-1137/04/$08.00+0     DOI: 10.1128/JCM.42.8.3441-3448.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.

High-Resolution Genotyping of Campylobacter upsaliensis Strains Originating from Three Continents

P. Lentzsch,¹ B. Rieksneuwöhner,² L. H. Wieler,² H. Hotzel,³ and I. Moser^3*

Centre for Agricultural Landscape and Land Use Research, Müncheberg,¹ Institute of Microbiology and Animal Epidemic Diseases, Free University, Berlin,² Federal Research Centre for Virus Diseases of Animals, Institute of Bacterial Infections and Zoonoses, Jena, Germany³

Received 9 January 2004/ Returned for modification 5 March 2004/ Accepted 4 May 2004

Ninety-six Campylobacter upsaliensis strains that originated from Australia, Canada, and Europe (Germany) and that were isolated from humans, dogs, and cats were serotyped for their heat-stable surface antigens. All of them were genotyped by enterobacterial repetitive intergenic consensus sequence PCR (ERIC-PCR) profiling, and 83 strains were genotyped by macrorestriction analysis with the endonuclease XhoI. Eighty-four percent of the strains belonged to five different serotypes (serotypes OI, OII, OIII, OIV, and OVI), with the proportions of strains in each serotype being comparable among the groups of strains from all three continents. Two serotypes, OIII and OIV, were prevalent at rates of 35 to 40%. Serotypes OI, OII, and OVI were detected at rates of 1.5 to 15%. Between 10 and 17.7% of the strains did not react with the available antisera. Analysis of the ERIC-PCR profiles revealed two distinct genotypic clusters, which represented the German and the non-European strains, respectively. XhoI macrorestriction yielded two genotypic clusters; one of them contained 80.2% of the German strains and 34.6% of the non-European strains, and the second cluster consisted of 65.4% of the non-European strains and 19.8% of the German strains. Fourteen strains from all three continents were analyzed for their 16S rRNA gene sequences. Only two minor variations were detected in four of the strains. In conclusion, C. upsaliensis has undergone diverging processes of genome arrangement on different continents during evolution without segregating into different subspecies.

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* Corresponding author. Mailing address: Bundesforschungsanstalt für Viruskrankheiten der Tiere, Institut für bakterielle Infektionen und Zoonosen, Naumburger Str. 96a, D-07743 Jena, Germany. Phone: 0049 3641 804 328. Fax: 0049 3641 804 228. E-mail: i.moser{at}jena.bfav.de.

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Journal of Clinical Microbiology, August 2004, p. 3441-3448, Vol. 42, No. 8
0095-1137/04/$08.00+0     DOI: 10.1128/JCM.42.8.3441-3448.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.

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