Identification and serotyping of Listeria monocytogenes, isolated from various salmon products, sold in retail market in Lithuania
https://doi.org/10.4081/ijfs.2021.9341
Submitted: 8 September 2020
Accepted: 6 July 2021
Published: 29 September 2021
Accepted: 6 July 2021
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All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.
Cold smoked salmon products (belly flaps, pieces, fillet, and loin) obtained from the retail market in Lithuania were tested for the presence of L. monocytogenes. It was found that contamination of the cold smoked fish products with Listeria spp. depends on the type of the product. Contamination with listeria in salmon belly flaps was 7.5 times higher than in the loin (P<0.05), 1.8 times higher than in the pieces (P<0.05) and 30 times higher than in the fillet (P<0.05). Microbiological analysis showed that 32.5% (P<0.05) of the fish product samples were infected with L. monocytogenes, while multiplex PCR confirmed 31.25% positive samples (P<0.01). According to the study results, L. monocytogenes strains were divided into two serotypes: 4b (94.6%) and 1/2a (5.4%). High contamination of the products with Listeria spp. showed that cold smoked salmon products, sold in local market, can be a reason of human listeriosis in Lithuania.
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J 2019;17(12):5926, 276 pp.
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17. Lopez-Valladares G, Danielsson-Tham ML, Tham W, 2018. Implicated Food Products for Listeriosis and Changes in Serovars of Listeria monocytogenes Affecting Humans in Recent Decades. Foodborne Pathog Dis 15(7):387–397.
18. Zhang Y, Dong S, Chen H, Chen J, Zhang J, Zhang Z, Yang Y, Xu Z, Zhan L, Mei L, 2019. Prevalence, Genotypic Characteristics and Antibiotic Resistance of Listeria monocytogenes From Retail Foods in Bulk in Zhejiang Province, China. Front Microbiol. 25(10):1710.
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1.
Simonavičienė I, Zakariene G, Lozoraitytė A, Zaborskienė G, Gerulis G, Stimbirys A. Identification and serotyping of <em>Listeria monocytogenes</em>, isolated from various salmon products, sold in retail market in Lithuania. Ital J Food Safety [Internet]. 2021 Sep. 29 [cited 2024 May 15];10(3). Available from: https://www.pagepressjournals.org/ijfs/article/view/9341
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