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- Title
Tracing of Listeria monocytogenes Contamination Routes in Fermented Sausage Production Chain by Pulsed-Field Gel Electrophoresis Typing.
- Authors
Pažin, Valerij; Jankuloski, Dean; Kozačinski, Lidija; Dobranić, Vesna; Njari, Bela; Cvrtila, Željka; Lorenzo, José Manuel; Zdolec, Nevijo
- Abstract
In this study, the presence of Listeria monocytogenes was assessed along the production process of fermented sausages in a small-scale facility. Following the isolation of the pathogen from the final product (ISO 11290-1), retrospective sampling was performed during the production of a new batch of sausages, including raw materials, casings, additives, sausage mixtures, sausages during fermentation, and environmental samples. L. monocytogenes was recovered from the following sampling points: the defrosting room and the cuttering, mixing, stuffing, and fermentation phases. Ten strains were isolated, molecularly confirmed as L. monocytogenes by means of a molecular detection system, and subjected to pulsed-field gel electrophoresis (PFGE) typing. On the basis of an unweighted pair group method with arithmetic mean (UPGMA) dendrogram from Ascl pulsotypes, the strains were indistinguishable (no band difference). The same pulsotypes of strains present in both batches of sausages, as well as in environmental samples, indicated the persistence of L. monocytogenes in the sausage production unit.
- Subjects
PULSED-field gel electrophoresis; LISTERIA monocytogenes; SAUSAGES; ENVIRONMENTAL sampling; ARITHMETIC mean
- Publication
Foods, 2018, Vol 7, Issue 12, p198
- ISSN
2304-8158
- Publication type
Article
- DOI
10.3390/foods7120198