绍兴市5起食源性副溶血性弧菌暴发事件的病原学特征和耐药性分析
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绍兴市疾病预防控制中心,浙江 绍兴 312071

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陈金堃 男 副主任技师 研究方向为微生物检验 E-mail: 453772128@qq.com

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R155

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Etiological characteristics and antimicrobial resistance of Vibrio parahaemolyticus strains causing five foodborne disease outbreaks in Shaoxing City
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Shaoxing Center for Disease Control and Prevention, Zhejiang Shaoxing 312071, China

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    摘要:

    目的 了解2022—2023年绍兴市食源性副溶血性弧菌暴发事件的病原学特征、分子分型及耐药特征。方法 收集2022—2023年绍兴市5起食源性暴发事件的副溶血性弧菌,采用玻片凝集法、脉冲场凝胶电泳(PFGE)、微量肉汤稀释法、多重荧光定量PCR法和全基因组测序对菌株进行血清分型、分子分型、药敏检测、毒力基因和生物信息学分析。结果 分离到36株副溶血性弧菌(1株分离自当日晚餐剩余食材,2株分别分离自厨房抹布、砧板的涂抹样本,33株分离自33名病例的肛拭子标本),共含10种血清型,以O10:K4为主;共有11种PFGE带型,以S2型为主;对头孢唑啉抗生素(36/36)普遍耐药,对氨苄西林(9/36)、链霉素(2/36)部分耐药。所有菌株tlh基因均为阳性,trh基因均为阴性,其中31株临床分离株和1株环境分离株携带tdh基因。通过序列分析,得到4种已知ST型和2种新ST型,23个核心基因组多位点序列分型(cgMLST)进化枝;预测出34株菌株携带耐药基因,主要携带blaCARB-22耐药基因。结论 2022—2023年绍兴5起食源性副溶血性弧菌暴发事件以O10:K4为主,对头孢唑啉普遍耐药;存在不同暴发事件的菌株同源,可能由共同污染源导致,应加强本地副溶血性弧菌的溯源工作和流行病学调查。

    Abstract:

    Objective To characterize the etiological characteristics, molecular epidemiology and antimicrobial resistance of Vibrio parahaemolyticus from outbreaks cases in Shaoxing City from 2022 to 2023.Methods The Vibrio parahaemolyticus strains were isolated from five outbreak events from 2022 to 2023. Serotyping, molecular typing, drug resistance testing, virulence gene detection and bioinformatics analysis were performed by slide agglutination, pulsed field gel electrophoresis (PFGE), broth microdilution, multiple fluorescent PCR and whole genome sequencing methods.Results The 36 strains of Vibrio parahaemolyticus were isolated from 1 leftover dinner ingredient, 2 kitchen swabs (cloth and cutting board) and 33 clinical anal swabs associated with outbreak. These isolates comprised ten different serotypes, with O10:K4 being the predominant one. All strains were divided into 11 band types, and the main PFGE type was S2. Among these strains, higher rates of resistance to cefazolin (36/36), Ampicillin (9/36), streptomycin (2/36) were found. All strains were positive for tlh and negative for trh. The 31clinical isolates and 1 environmental isolate carried tdh gene. 4 known ST types, 2 new ST types and 23 core genome MLST (cgMLST) types were identified by sequence analysis. Thirty-four strains carried the resistant gene, mainly blaCARB-22.Conclusion Five foodborne disease outbreaks caused by Vibrio parahaemolyticus were occurred in Shaoxing from 2022 to 2023. O10:K4 was the predominant serotypes of outbreaks. The isolates were all resistant to cefazolin. There is a high homogeneity between the strains of different outbreaks, indicating persistent sources of contamination ignored by traditional methods. It is necessary to strengthen the tracing and epidemiological investigation of Vibrio parahaemolyticus in this region.

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陈金堃,张琴超,何琴芬,陈吉铭,蒋卓婧,周梁康,唐诗洁.绍兴市5起食源性副溶血性弧菌暴发事件的病原学特征和耐药性分析[J].中国食品卫生杂志,2025,37(7):674-680.

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  • 收稿日期:2024-07-04
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  • 在线发布日期: 2025-11-13
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