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Applied and Environmental Microbiology, June 2006, p. 4061-4066, Vol. 72, No. 6
0099-2240/06/$08.00+0 doi:10.1128/AEM.01996-05
Copyright © 2006, American Society for Microbiology. All Rights Reserved.
Institute of Veterinary Bacteriology, Zentrum für Zoonosen, bakterielle Tierkrankheiten und Antibiotikaresistenz (ZOBA), University of Bern, Bern, Switzerland,1 Danish Institute for Food and Veterinary Research, Copenhagen, Denmark,2 Section of Microbiology and Biotechnology, Swiss Federal Office of Public Health, Bern-Liebefeld, Switzerland,3 Molecular Microbiology and Genomics Consultants, Zotzenheim, Germany,4 Laboratories, Federal Veterinary Office, Bern-Liebefeld, Switzerland5
Received 25 August 2005/ Accepted 16 March 2006
In this study, 231 strains of Yersinia enterocolitica, 25 strains of Y. intermedia, and 10 strains of Y. bercovieri from human and porcine sources (including reference strains) were analyzed using amplified fragment length polymorphism (AFLP), a whole-genome fingerprinting method for subtyping bacterial isolates. AFLP typing distinguished the different Yersinia species examined. Representatives of Y. enterocolitica biotypes 1A, 1B, 2, 3, and 4 belonged to biotype-related AFLP clusters and were clearly distinguished from each other. Y. enterocolitica biotypes 2, 3, and 4 appeared to be more closely related to each other (83% similarity) than to biotypes 1A (11%) and 1B (47%). Biotype 1A strains exhibited the greatest genetic heterogeneity of the biotypes studied. The biotype 1A genotypes were distributed among four major clusters, each containing strains from both human and porcine sources, confirming the zoonotic potential of this organism. The AFLP technique is a valuable genotypic method for identification and typing of Y. enterocolitica and other Yersinia spp.
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