Identification and serotyping of Listeria monocytogenes, isolated from various salmon products, sold in retail market in Lithuania.

IF 1.8 Q3 FOOD SCIENCE & TECHNOLOGY

Italian Journal of Food Safety Pub Date : 2021-09-29 DOI:10.4081/ijfs.2021.9341

Ineta Simonavičienė, Gintarė Zakarienė, Aušra Lozoraitytė, Gintarė Zaborskienė, Gediminas Gerulis, Artūras Stimbirys

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Abstract

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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从立陶宛零售市场上出售的各种三文鱼产品中分离出的李斯特菌的鉴定和血清分型。

对从立陶宛零售市场上获得的冷熏三文鱼产品（肚片、鱼块、鱼柳和鱼腰）进行了单核细胞增生李斯特氏菌含量检测。结果发现，李斯特菌对冷熏鱼产品的污染取决于产品的类型。鲑鱼肚皮中的李斯特菌污染比里脊中的高 7.5 倍（PL. monocytogenes），而多重聚合酶链式反应（multiplex PCR）确认了 31.25% 的阳性样品（P. monocytogenes）。根据研究结果，李斯特菌菌株分为两种血清型：4b（94.6%）和 1/2a （5.4%）。李斯特菌属对产品的高污染表明，在立陶宛，当地市场上销售的冷熏三文鱼产品可能是导致人类李斯特菌病的原因之一。

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来源期刊

Italian Journal of Food Safety FOOD SCIENCE & TECHNOLOGY-

CiteScore

2.50

自引率

0.00%

发文量

审稿时长

10 weeks

期刊介绍： The Journal of Food Safety (IJFS) is the official journal of the Italian Association of Veterinary Food Hygienists (AIVI). The Journal addresses veterinary food hygienists, specialists in the food industry and experts offering technical support and advice on food of animal origin. The Journal of Food Safety publishes original research papers concerning food safety and hygiene, animal health, zoonoses and food safety, food safety economics. Reviews, editorials, technical reports, brief notes, conference proceedings, letters to the Editor, book reviews are also welcome. Every article published in the Journal will be peer-reviewed by experts in the field and selected by members of the editorial board. The publication of manuscripts is subject to the approval of the Editor who has knowledge of the field discussed in the manuscript in accordance with the principles of Peer Review; referees will be selected from the Editorial Board or among qualified scientists of the international scientific community. Articles must be written in English and must adhere to the guidelines and details contained in the Instructions to Authors.