Prevalence, Antibiotic Resistance, and Molecular Epidemiology of Staphylococcus aureus Isolated from Imported Foods in China.

IF 2.3 2区农林科学 Q3 FOOD SCIENCE & TECHNOLOGY

Foodborne pathogens and disease Pub Date : 2026-07-08 DOI:10.1177/15353141261466472

Hangtian Ma, Lina Zhao, Yuqiu Zhang, Xin Wang, Jilin Yang, Yuan Jiang, Yu Feng, Min Xu, Qiong Liu, Jinling Shen, Shuai Zhi

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Abstract

This 3-year surveillance study investigated the contamination patterns and genomic characteristics of Staphylococcus aureus in 2133 imported food samples, including frozen beef, frozen pork, frozen fish, frozen chicken, and cheese. An overall S. aureus contamination rate of 4.4% (93/2133) was observed, with frozen beef showing the highest prevalence (6.0%, 68/1139). The 93 isolates showed high resistance rates to ampicillin at 61.3% and penicillin at 58.1%. Methicillin-resistant S. aureus (MRSA) strains were identified in 14.0% (13/93) of them. Substantial genetic diversity was observed, with 24 sequence types (STs) and 41 spa types identified. The major prevalent clones included the globally prevalent ST5 (19.4%), of which 44.4% (8/18) carried at least one enterotoxin gene, as well as the livestock-associated ST398 (11.8%), which was significantly lower than its prevalence rate in China. The clone ST1460-t156 (10 strains) derived from equine-associated lineages was detected in strains isolated from beef samples. Virulence gene profiling revealed diverse enterotoxin carriage, with some strains carrying four or five enterotoxin genes simultaneously. Although a relatively low contamination rate of S. aureus was observed in the imported food products, the high prevalence of MRSA and carriage of several virulent strains necessitate close monitoring of S. aureus within global food supply chains to provide essential data for developing risk-based food safety interventions.

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中国进口食品中金黄色葡萄球菌的流行、耐药性及分子流行病学研究

这项为期3年的监测研究调查了2133份进口食品样品的金黄色葡萄球菌污染模式和基因组特征，包括冷冻牛肉、冷冻猪肉、冷冻鱼、冷冻鸡肉和奶酪。金黄色葡萄球菌总体污染率为4.4%(93/2133)，其中冷冻牛肉感染率最高（6.0%,68/1139）。93株菌株对氨苄西林和青霉素的耐药率分别为61.3%和58.1%。耐甲氧西林金黄色葡萄球菌（MRSA）检出率为14.0%（13/93）。遗传多样性显著，共鉴定出24种序列类型（STs）和41种spa类型。主要流行无性系包括全球流行的ST5无性系（19.4%），其中44.4%（8/18）携带至少一个肠毒素基因，以及家畜相关的ST398无性系（11.8%），显著低于其在中国的流行率。从牛肉样品分离的菌株中检测到来自马相关谱系的克隆ST1460-t156（10株）。毒力基因分析显示肠毒素携带的多样性，一些菌株同时携带4或5个肠毒素基因。虽然在进口食品中观察到金黄色葡萄球菌的污染率相对较低，但MRSA的高流行率和几种毒性菌株的携带需要在全球食品供应链中密切监测金黄色葡萄球菌，为制定基于风险的食品安全干预措施提供重要数据。

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

Foodborne pathogens and disease 医学-食品科技

CiteScore

5.30

自引率

3.60%

发文量

审稿时长

1 months

期刊介绍： Foodborne Pathogens and Disease is one of the most inclusive scientific publications on the many disciplines that contribute to food safety. Spanning an array of issues from "farm-to-fork," the Journal bridges the gap between science and policy to reduce the burden of foodborne illness worldwide. Foodborne Pathogens and Disease coverage includes: Agroterrorism Safety of organically grown and genetically modified foods Emerging pathogens Emergence of drug resistance Methods and technology for rapid and accurate detection Strategies to destroy or control foodborne pathogens Novel strategies for the prevention and control of plant and animal diseases that impact food safety Biosecurity issues and the implications of new regulatory guidelines Impact of changing lifestyles and consumer demands on food safety.