Typing of O26 enterohaemorrhagic and enteropathogenic Escherichia coli isolated from humans and cattle with IS621 multiplex PCR-based fingerprinting

Jacques G. Mainil, M. Bardiau, T. Ooka, Y. Ogura, K. Murase, Y. Etoh, S. Ichihara, K. Horikawa, G. Buvens, D. Piérard, T. Itoh, T. Hayashi

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Aims: This study evaluated a typing method of O26:H11 enterohaemorrhagic and enteropathogenic Escherichia coli (EHEC and EPEC) based on the variation in genomic location and copy numbers of IS621. Methods and Results: Two multiplex PCRs, targeting either the left (5') or right (3') IS/chromosome junction of 12 IS621 insertion sites and one PCR specific of another truncated copy, were developed. Thirty-eight amplification profiles were observed amongst a collection of 69 human and bovine O26:H11 EHEC and EPEC. Seventy-one per cent of the 45 EHEC and EPEC with identical IS621 fingerprints within groups of two, three or four isolates had >85% pulsed field gel electrophoresis (PFGE) profile similarity, including four groups of epidemiologically related EHEC or EPEC, while most of the groups had <85% similarity between each others. Epidemiologically related EHEC from each of three independent outbreaks in Japan and Belgium also exhibited identical IS621 fingerprints and PFGE profiles. Conclusions: The IS621 fingerprinting and the PFGE are complementary typing assays of EHEC and EPEC; though, the former is less discriminatory. Significance and Impact of the Study: The IS621 printing method represents a rapid (24h) first-line surveillance and typing assay, to compare and trace back O26:H11 EHEC and EPEC during surveys in farms, multiple human cases and outbreaks.

Original languageEnglish
Pages (from-to)773-786
Number of pages14
JournalJournal of Applied Microbiology
Volume111
Issue number3
DOIs
Publication statusPublished - Sep 1 2011
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Applied Microbiology and Biotechnology

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