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Applied and Environmental Microbiology, June 2006, p. 4464-4471, Vol. 72, No. 6
0099-2240/06/$08.00+0     doi:10.1128/AEM.02843-05
Copyright © 2006, American Society for Microbiology. All Rights Reserved.

SHORT REPORT

Atypical Helicobacter canadensis Strains Associated with Swine{dagger}

G. Douglas Inglis,1* Malcolm McConville,2 and Anno de Jong3

Food Safety and Quality National Program, Agriculture and Agri-Food Canada Research Centre, 5403 1st Avenue S, Lethbridge, Alberta, T1J 4B1, Canada,1 Charles River Laboratories, Tranent, Edinburgh EH33 2NE, United Kingdom,2 Bayer HealthCare AG, Animal Health Division, 51368 Leverkusen, Germany3

Received 2 December 2005/ Accepted 4 April 2006

Forty-two Helicobacter isolates were isolated from swine feces in The Netherlands and Denmark. All 12 isolates sequenced (16S rRNA gene) formed a robust clade with Helicobacter canadensis (~99% similarity). Species-specific PCR indicated that all of the isolates were H. canadensis isolates. Although the appearance of the porcine isolates was similar to the appearance of H. canadensis, only one of these isolates was able to hydrolyze indoxyl acetate, a cardinal characteristic of this taxon. Examination of the 23S rRNA and hsp60 genes revealed high levels of similarity between the porcine isolates and H. canadensis. However, amplified fragment length polymorphism genomic typing showed that isolates recovered from swine feces were genetically distinct from H. canadensis strains obtained from humans and geese.

* Corresponding author. Mailing address: Agriculture and Agri-Food Canada, 5403 1st Avenue S, Lethbridge, AB T1J 4B1, Canada. Phone: (403) 317-3355. Fax: (403) 382-3156. E-mail: inglisd{at}agr.gc.ca.

{dagger} Contribution 05018 from the Agriculture and Agri-Food Canada Research Centre, Lethbridge, Alberta, Canada.

Applied and Environmental Microbiology, June 2006, p. 4464-4471, Vol. 72, No. 6
0099-2240/06/$08.00+0     doi:10.1128/AEM.02843-05
Copyright © 2006, American Society for Microbiology. All Rights Reserved.



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