ArticleApplied and environmental microbiology2012
Atypical Listeria monocytogenes serotype 4b strains harboring a lineage II-specific gene cassette.
Article in Applied and environmental microbiology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.
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27 citing papers in PubMed.
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- Invasive listeriosis in Finland: surveillance and cluster investigations, 2011-2021.Epidemiology and infection · 2023Article
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- Horizontal Gene Transfer and Loss of Serotype-Specific Genes in Listeria monocytogenes Can Lead to Incorrect Serotype Designations with a Commonly-Employed Molecular Serotyping Scheme.Microbiology spectrum · 2023Article
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- Listeriosis Cases and Genetic Diversity of TheirFrontiers in cellular and infection microbiology · 2021Article
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- Genetic Characterization of a Listeria monocytogenes Serotype IVb Variant 1 Strain Isolated from Vegetal Matrix in Italy.Microbiology resource announcements · 2020Article
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- Microevolution and Gain or Loss of Mobile Genetic Elements of Outbreak-RelatedFrontiers in microbiology · 2020Article
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- The Arsenic Resistance-Associated Listeria Genomic Island LGI2 Exhibits Sequence and Integration Site Diversity and a Propensity for Three Listeria monocytogenes Clones with Enhanced Virulence.Applied and environmental microbiology · 2017Article
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7 authors.
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Abstract
Listeria monocytogenes is the etiological agent of listeriosis, a severe food-borne illness. The population of L. monocytogenes is divided into four lineages (I to IV), and serotype 4b in lineage I has been involved in numerous outbreaks. Several serotype 4b epidemic-associated clonal groups (ECI, -II, and -Ia) have been identified. In this study, we characterized a panel of strains of serotype 4b that produced atypical results with a serotype-specific multiplex PCR and possessed the lmo0734 to lmo0739 gene cassette that had been thought to be specific to lineage II. The cassette was harbored in a genomically syntenic locus in these isolates and in lineage II strains. Three distinct clonal groups (groups 1 to 3) were identified among these isolates based on single-nucleotide polymorphism-based multilocus genotyping (MLGT) and DNA hybridization data. Groups 1 and 2 had MLGT haplotypes previously encountered among clinical isolates and were composed of clinical isolates from multiple states in the United States. In contrast, group 3 consisted of clinical and environmental isolates solely from North Carolina and exhibited a novel haplotype. In addition, all group 3 isolates had DNA that was resistant to MboI, suggesting methylation of adenines at GATC sites. Sequence analysis of the lmo0734 to lmo0739 gene cassette from two strains (group 1 and group 3) revealed that the genes were highly conserved (>99% identity). The data suggest relatively recent horizontal gene transfer from lineage II L. monocytogenes into L. monocytogenes serotype 4b and subsequent dissemination among at least three distinct clonal groups of L. monocytogenes serotype 4b, one of which exhibits restrictions in regional distribution.
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