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Open AccessArticle

Retrospective Study of Listeria monocytogenes Isolated in the Territory of Inner Eurasia from 1947 to 1999

1
Federal Research Center for Virology and Microbiology, Nizhny Novgorod Research Veterinary Institute Branch, Nizhny Novgorod 603950, Russia
2
Federal Research Center for Virology and Microbiology, Volginsky 601125, Russia
3
Federal Research Center for Virology and Microbiology, Samara Research Veterinary Institute Branch, Samara 443013, Russia
4
Gamaleya Research Centre of Epidemiology and Microbiology, Moscow 123098, Russia
*
Author to whom correspondence should be addressed.
Pathogens 2019, 8(4), 184; https://doi.org/10.3390/pathogens8040184
Received: 8 August 2019 / Revised: 22 September 2019 / Accepted: 10 October 2019 / Published: 11 October 2019
(This article belongs to the Special Issue Molecular Microbiology of Foodborne Pathogens)
Listeriosis is one of the most significant humans and animals foodborne infectious diseases. Here, we characterized 48 Listeria monocytogenes strains isolated in the territory of inner Eurasia during the second half of the 20th century. A total of 23 strains (52.3%) were susceptible to the nine antibiotics tested, 30.43%, 15.22%, and 8.7% were resistant penicillin G, ampicillin, and enrofloxacin, respectively. We applied the multilocus sequence typing (MLST) scheme to determine the phylogenetic positions of the strains. All but one strain belonged to the II phylogenetic lineage, and the majority of the strains belonged to one of the previously described clonal complexes (CCs). More than 60% of the strains belonged to the clonal complex CC7 that prevailed among all sources, including cattle (58%), small ruminants (64%), rodents (71%), and humans (50%). Further, CC7, CC101, and CC124 were found among human isolates. The MLST scheme was supplemented with virulence gene analysis. In total, eight inlA, six inlB, and six inlC allelic variants were found, and all but one strain carried one of the two inlE alleles. Most strains (62.5%) belonged to the same multivirulence locus sequence typing (MvLST) type, which includes CC7, inlA allele 4, inlB allele 14, inlC allele 6, and inlE allele 8. View Full-Text
Keywords: Listeria monocytogenes; listeriosis; food infections; virulence; multilocus sequence typing; clonal complex; phylogenetic lineages Listeria monocytogenes; listeriosis; food infections; virulence; multilocus sequence typing; clonal complex; phylogenetic lineages
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Psareva, E.K.; Egorova, I.Y.; Liskova, E.A.; Razheva, I.V.; Gladkova, N.A.; Sokolova, E.V.; Potemkin, E.A.; Zhurilov, P.A.; Mikhaleva, T.V.; Blokhin, A.A.; Chalenko, Y.M.; Kolbasov, D.V.; Ermolaeva, S.A. Retrospective Study of Listeria monocytogenes Isolated in the Territory of Inner Eurasia from 1947 to 1999. Pathogens 2019, 8, 184.

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