The prevalence, distribution, and diversity of Salmonella isolated from pork slaughtering processors and retail outlets in the Shandong Province of China

IF 7.1 1区农林科学 Q1 Agricultural and Biological Sciences

Meat Science Pub Date : 2024-12-19 DOI:10.1016/j.meatsci.2024.109734

Haoqi Zhang , Guanghui Zhou , Caishuai Yang , George-John E. Nychas , Yimin Zhang , Yanwei Mao

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Abstract

Salmonella is a foodborne pathogen of global significance and is highly prevalent in pork. This study investigated the prevalence, contamination distribution, virulence genes and antibiotic resistance of Salmonella in 3 pork processors in the Shandong Province of China. Samples were collected from 13 different sampling sources across the slaughter procedures (600 samples) as well as at retail outlets supplied by these processors (45 samples). The prevalence was 18.9 % among all the samples, with the highest prevalence observed in feces (40.0 %), lairage pens (38.0 %), and hides (34.0 %). A total of 6 serotypes were identified, with S. Rissen (46.3 %) and S. typhimurium (32.0 %) found to be the most prevalent serotypes. 86.8 % of Salmonella isolates were multi-drug resistant, with the majority of strains resistant to erythromycin, sulfisoxazole, and ampicillin. The multilocus sequence typing analysis revealed 6 STs were obtained from 45 isolates, with the dominant type ST469 accounting for 40.0 % of the total, which suggested a high possibility of cross-contamination between the plant processing chain and retail outlets. This work reveals the prevalence and correlation of Salmonella isolates between pork slaughter and retail outlets and acts as a case-study for stakeholders wishing to improve pork supply chain hygiene, control cross-contamination between the various slaughtering processes, and obtain continuous updates on Salmonella surveillance.

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中国山东省猪肉屠宰加工商和零售网点分离沙门氏菌的流行、分布和多样性

沙门氏菌是一种具有全球意义的食源性病原体，在猪肉中高度流行。本研究调查了山东省3家猪肉加工企业沙门氏菌的流行、污染分布、毒力基因及耐药性。从屠宰程序中的13个不同采样来源（600个样本）以及这些加工商提供的零售网点（45个样本）收集了样本。所有样本的感染率为18.9%，其中粪便（40.0%）、猪圈（38.0%）和兽皮（34.0%）的感染率最高。共鉴定出6种血清型，其中Rissen s（46.3%）和鼠伤寒s（32.0%）为最常见的血清型。86.8%的沙门氏菌具有多重耐药，其中以红霉素、磺胺恶唑和氨苄西林耐药为主。多位点序列分型分析显示，45株分离株共分离出6个STs，其中优势型ST469占40.0%，表明该菌株极有可能在植物加工链和零售店之间交叉污染。这项工作揭示了猪肉屠宰和零售网点之间沙门氏菌分离的流行程度和相关性，并作为希望改善猪肉供应链卫生，控制各种屠宰过程之间交叉污染的利益相关者的案例研究，并获得沙门氏菌监测的持续更新。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Meat Science 工程技术-食品科技

CiteScore

12.60

自引率

9.90%

发文量

282

审稿时长

60 days

期刊介绍： The aim of Meat Science is to serve as a suitable platform for the dissemination of interdisciplinary and international knowledge on all factors influencing the properties of meat. While the journal primarily focuses on the flesh of mammals, contributions related to poultry will be considered if they enhance the overall understanding of the relationship between muscle nature and meat quality post mortem. Additionally, papers on large birds (e.g., emus, ostriches) as well as wild-captured mammals and crocodiles will be welcomed.