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  Molecular typing and genome sequencing allow the identification of persistent Listeria monocytogenes strains and the tracking of the contamination source in food environments

Lucchini, R., Carraro, L., Pauletto, M., Gallo, M., Andreani, N. A., Weiss, G., et al. (2023). Molecular typing and genome sequencing allow the identification of persistent Listeria monocytogenes strains and the tracking of the contamination source in food environments. International Journal of Food Microbiology, 386: 110025. doi:10.1016/j.ijfoodmicro.2022.110025.

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 Urheber:
Lucchini, R., Autor
Carraro, L., Autor
Pauletto, M., Autor
Gallo, M., Autor
Andreani, N. A.1, Autor                 
Weiss, G., Autor
Tessaro, C., Autor
Babbucci, M., Autor
Cardazzo, B., Autor
Affiliations:
1Guest Group Evolutionary Medicine (Baines), Max Planck Institute for Evolutionary Biology, Max Planck Society, ou_3371474              

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Schlagwörter: Listeria monocytogenes; Strain traceability in food processing facilities; 2b-RAD typing; SNP analysis; WGS of lm genomes; Strain persistence;
 Zusammenfassung: The presence of Listeria monocytogenes (Lm) in the food processing environment (facilities and products) is a challenging problem in food safety management. Lm is one of the main causes of mortality in foodborne infections, and the trend is continuously increasing. In this study, a collection of 323 Lm strain isolates recovered from food matrices and food industry environments (surfaces and equipment) over four years from 80 food processing facilities was screened using a restriction site-associated tag sequencing (2b-RAD) typing approach developed for Lm. Thirty-six different restriction site-associated DNA (RAD) types (RTs) were identified, most of which correspond to lineage II. RT1, the most represented genotype in our collection and already reported as one of the most prevalent genotypes in the food environment, was significantly associated with meat processing facilities. The sequencing of the genomes of strains belonging to the same RT and isolated in the same facility in different years revealed several clusters of persistence. The definition of the persistent strains (PSs) allowed the identification of the potential source of contamination in the incoming raw meat that is introduced in the facility to be processed. The slaughterhouses, which, according to the European Union (EU) regulation, are not inspected for the presence of Lm could be hotspots for the persistence of Lm PSs.

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Sprache(n): eng - English
 Datum: 2022-11-082022-08-022022-11-162022-11-222023-02
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: DOI: 10.1016/j.ijfoodmicro.2022.110025
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Titel: International Journal of Food Microbiology
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Amsterdam : Elsevier
Seiten: - Band / Heft: 386 Artikelnummer: 110025 Start- / Endseite: - Identifikator: ISSN: 0168-1605
CoNE: https://pure.mpg.de/cone/journals/resource/0168-1605