北京市售金针菇微生物组及其耐药基因、毒力因子分布特征
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1南方医科大学公共卫生学院,广东 广州 510515;2国家食品安全风险评估中心 国家卫生健康委员会食品安全风险评估重点实验室,北京 100021

作者简介:

农莹莹 女 在读研究生 研究方向为食品微生物 E-mail: 1548218545@qq.com

通讯作者:

赵柬云 女 副研究员 研究方向为食品微生物 E-mail: zhaojianyun@cfsa.net.cn
吴永宁 男 研究员 研究方向为食品安全 E-mail: wuyongning@cfsa.net.cn

中图分类号:

R155

基金项目:

国家重点研发计划(2024YFF1106705)


Characterization of microbiota, antibiotic resistance genes and virulence factors in retail Flammulina velutipes in Beijing City
Author:
Affiliation:

1College of Public Health, Southern Medical University, Guangdong Guangzhou 510515, China;2China National Center for Food Safety Risk Assessment, Key Laboratory of Food Safety Risk Assessment, National Health Commission, Beijing 100021, China

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    摘要:

    目的 利用宏基因组测序,解析金针菇微生物群落结构、耐药基因与毒力因子分布特征,评估其潜在食品安全风险。方法 采集北京市市售金针菇样本9份,提取总DNA进行宏基因组测序,结合生物信息学方法分析菌群组成、耐药基因及毒力因子。结果 宏基因组测序结果显示金针菇优势菌门为假单胞菌门与芽孢杆菌门;优势菌属为尤因氏菌属、明串球菌属和假单胞菌属。9份样品均注释出肠道沙门菌、小肠结肠炎耶尔森菌及单核细胞增生李斯特菌等常见食源性致病菌,但相对丰度较低。金针菇尾部微生物多样性高于头部,头部以环境菌及致病菌为主,尾部则以乳酸菌为主。测序结果共注释到2 394个毒力基因,主要与荚膜、鞭毛、脂寡糖等毒力因子相关。注释耐药基因242个,其中rosb(23.68%)和baca(23.41%)基因相对丰度最高,且多数耐药基因与多重耐药有关。对68个宏基因组组装基因组(MAGs)完成物种分类学注释,优势菌门为芽孢杆菌门和假单胞菌门,优势菌属为明串球菌属、假单胞菌属和乳酸球菌属。结论 金针菇携带多种食源性致病菌、丰富的毒力因子和耐药基因,存在较高食品安全风险,从生产至销售环节应加强微生物监控并制定相应控制措施。

    Abstract:

    Objective To analyze the microbial community structure, distribution of antibiotic resistance genes and virulence factors in Flammulina velutipes using metagenomic sequencing, and explore its potential food safety risks.Methods Nine retail F. velutipes samples were detected. Total DNA was extracted for metagenomic sequencing, and bioinformatics methods were used to analyze the microbial community composition, antibiotic resistance genes and virulence factors.Results Metagenomic sequencing results indicated that the dominant bacterial phyla in F. velutipes were Pseudomonadota and Bacillota, and the dominant bacterial genera were EwingellaLeuconostoc, and Pseudomonas. Common foodborne pathogens such as Salmonella entericaYersinia enterocolitica, and Listeria monocytogenes were annotated in all nine samples, but with low relative abundances. Microbial diversity was higher in the lower segments than in the upper segments of F. velutipes. While environmental bacteria and pathogens were predominant the upper segments, in contrast, lactic acid bacteria predominated in the lower segments. A total of 2 394 virulence factors were annotated, among them most related to virulence mechanisms such as capsules, flagella, and oligosaccharides. A total of 242 antibiotic resistant genes (ARGs) were annotated, among which rosb (23.68%) and baca (23.41%) had the highest relative abundances, and most ARGs corelated with multidrug resistance mechanism. Species taxonomic annotation was carried out for 68 metagenome-assembled genomes (MAGs). Of all the MAGs, the dominant phyla were Bacillota and Pseudomonadota, and the dominant genera were LeuconostocPseudomonas, and Lactococcus.Conclusion F. velutipes harbor various foodborne pathogens, virulence factors, and resistance genes, posing significant food safety risks. Enhanced microbial monitoring and corresponding control measures should be implemented throughout the food chain.

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农莹莹,白莉,甘辛,李孟寒,吴永宁,赵柬云.北京市售金针菇微生物组及其耐药基因、毒力因子分布特征[J].中国食品卫生杂志,2025,37(11):1051-1061.

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  • 收稿日期:2025-10-08
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  • 在线发布日期: 2026-04-02
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