Identification of variable-number tandem-repeat (VNTR) sequences in Legionella pneumophila and development of an optimized multiple-locus VNTR analysis typing scheme

Christine Pourcel, Paolo Visca, Baharak Afshar, Silvia D'Arezzo, Gilles Vergnaud, Norman K. Fry

Research output: Contribution to journalArticle

Abstract

The utility of a genotypic typing assay for Legionella pneumophila was investigated. A multiple-locus variable number of tandem repeats (VNTR) analysis (MLVA) scheme using PCR and agarose gel electrophoresis is proposed based on eight minisatellite markers. Panels of well-characterized strains were examined in a multicenter analysis to validate the assay and to compare its performance to that of other genotyping assays. Excellent typeability, reproducibility, stability, and epidemiological concordance were observed. The MLVA type or profile is composed of a string of allele numbers, corresponding to the number of repeats at each VNTR locus, separated by commas, in a predetermined order. A database containing information from 99 L. pneumophila serogroup 1 strains and four strains of other serogroups and their MLVA profiles, which can be queried online, is available from http://bacterial-genotyping.igmors.u-psud.fr/.

Original languageEnglish
Pages (from-to)1190-1199
Number of pages10
JournalJournal of Clinical Microbiology
Volume45
Issue number4
DOIs
Publication statusPublished - Apr 2007

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ASJC Scopus subject areas

  • Microbiology (medical)
  • Microbiology

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