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© Therese Couderc, Marc Lecuit
Publication : BMC microbiology

Polyphasic characterization and genetic relatedness of low-virulence and virulent Listeria monocytogenes isolates

Team: Biology of Infection
Member: Alexandre Leclercq
Scientific Fields
Diseases
Organisms
Applications
Technique

Published in BMC microbiology - 26 Dec 2012

Roche SM, Grépinet O, Kerouanton A, Ragon M, Leclercq A, Témoin S, Schaeffer B, Skorski G, Mereghetti L, Le Monnier A, Velge P

Link to Pubmed [PMID] – 23267677

BMC Microbiol. 2012 Dec;12:304

Currently, food regulatory authorities consider all Listeria monocytogenes isolates as equally virulent. However, an increasing number of studies demonstrate extensive variations in virulence and pathogenicity of L. monocytogenes strains. Up to now, there is no comprehensive overview of the population genetic structure of L. monocytogenes taking into account virulence level. We have previously demonstrated that different low-virulence strains exhibit the same mutations in virulence genes suggesting that they could have common evolutionary pathways. New low-virulence strains were identified and assigned to phenotypic and genotypic Groups using cluster analysis. Pulsed-field gel electrophoresis, virulence gene sequencing and multi-locus sequence typing analyses were performed to study the genetic relatedness and the population structure between the studied low-virulence isolates and virulent strains.

https://www.ncbi.nlm.nih.gov/pubmed/23267677