Genetic diversity of Listeria monocytogenes recovered from infected persons and pork, seafood and dairy products on retail sale in France during 2000 and 2001

Antimicrobial susceptibilities of Listeria monocytogenes strains isolated from food and food processing environment in Poland

“…The majority of the collected L. monocytogenes isolates belonged to serotypes 1/2a, 1/2c, and 1/2b (92.4%), which is in agreement with previous studies in several countries (Aury-Hainry et al, 2011;Hong et al, 2007;O'Connor et al, 2010;Tamburro et al, 2010;Yan et al, 2010). The predominant occurrence of serotype 1/2a indicates its good ecological fitness.…”

Pathogenomics of Listeria spp.

“…Unexpectedly, this strain was not identified among the human isolates tested. DNA array characterization of these pork product-associated strains identified a specific genetic profile and the absence of five genes predicted to encode internalins and other cell surface proteins, similar to the lineage III isolates (Hong et al, 2007). Thus surface protein diversity may explain/contribute to the adaptation of L. monocytogenes to different environments.…”

Listeria monocytogenes lineages: Genomics, evolution, ecology, and phenotypic characteristics

“…While a few studies (Hong et al, 2007;Jeffers et al, 2001;Kiss et al, 2006) have shown that lineage I isolates are also overrepresented among sporadic cases of human listeriosis (e.g., as compared to their prevalence among food isolates), this trend does not seem to be consistent and the association between lineages and human listeriosis cases may vary by region. In particular lineage II serotype 1/2a strains appear to be more common among human listeriosis cases in Northern Europe [e.g., in Finland (Lukinmaa et al, 2003) and Sweden (Parihar et al, 2008)], Fig.…”

“…The majority of human listeriosis outbreaks worldwide have been linked to lineage I serotype 4b isolates, even though some outbreaks have been caused by lineage I serotype 1/2b isolates and lineage II serotype 1/2a isolates (Aureli et al, 2000;Gianfranceschi et al, 2003;Hong et al, 2007;Jeffers et al, 2001;Kiss et al, 2006;McLauchlin et al, 2004). While a few studies (Hong et al, 2007;Jeffers et al, 2001;Kiss et al, 2006) have shown that lineage I isolates are also overrepresented among sporadic cases of human listeriosis (e.g., as compared to their prevalence among food isolates), this trend does not seem to be consistent and the association between lineages and human listeriosis cases may vary by region.…”