Genetic and phenotypic characterization of Listeria monocytogenes lineage III

Microbiology
Angela RobertsMartin Wiedmann

Abstract

Listeria monocytogenes has been previously grouped into three evolutionary groups, termed lineages I, II and III. While lineages I and II are commonly isolated from various sources, lineage III isolates are rare and have several atypical and unique phenotypic characteristics. Relative to their prevalence in other sources, lineage III strains are overrepresented among isolates from food-production animals, and underrepresented among isolates from human clinical cases and foods. This work describes an extensive genotypic and phenotypic characterization of 46 lineage III isolates. Phylogenetic analyses of partial sigB and actA sequences showed that lineage III represents three distinct subgroups, which were termed IIIA, IIIB and IIIC. Each of these lineage III subgroups is characterized by differentiating genotypic and phenotypic characteristics. Unlike typical L. monocytogenes, all subgroup IIIB and IIIC isolates lack the ability to ferment rhamnose. While all IIIC and most IIIB isolates carry the putative virulence gene lmaA, the majority of subgroup IIIA isolates lack this gene. All three lineage III subgroups contain isolates from human clinical cases as well as isolates that are cytopathogenic in a cell culture plaque assay, ...Continue Reading

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Citations

Sep 18, 2008·Epidemiology and Infection·V VasilevD Cohen
Jun 19, 2013·Critical Reviews in Food Science and Nutrition·Wladir B Valderrama, Catherine N Cutter
Aug 17, 2010·Foodborne Pathogens and Disease·Teresa M BergholzMartin Wiedmann
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Jul 12, 2011·Applied and Environmental Microbiology·Sara LomonacoMaria Teresa Bottero
Jul 27, 2010·Applied and Environmental Microbiology·Henk C den BakkerMartin Wiedmann
Oct 22, 2008·Applied and Environmental Microbiology·Todd J WardJoseph P Bielawski
Dec 6, 2011·Applied and Environmental Microbiology·Sangmi LeeSophia Kathariou
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Feb 11, 2010·BMC Genomics·Renato H OrsiMartin Wiedmann
Jul 5, 2013·PloS One·Henk C den BakkerMartin Wiedmann
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