2018年广州市水产品中创伤弧菌和河弧菌检测分析
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(广州市疾病预防控制中心,广东 广州 510440)

作者简介:

张晶 女 副主任技师 研究方向为病原微生物学 E-mail:zhangjing9468@sina.cn

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广州市医药卫生科技项目(20171A011274);广东省科技计划项目(2016A020215217);广州市科技计划项目(201707010130);广州市医学重点学科建设项目(2017-2019-07)


Detection and characterization of Vibrio vulnificus and Vibrio fluvibrio in aquatic products of Guangzhou, 2018
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(Guangzhou Center for Diseases Control and Prevention, Guangdong Guangzhou 510440, China)

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    摘要:

    目的 了解为期一年的监测中广州市水产品创伤弧菌和河弧菌污染水平、菌株携带毒力基因和分子分型情况。方法 对广州市水产品中创伤弧菌和河弧菌进行分离鉴定,毒力基因鉴定和肠道细菌基因间重复序列聚合酶链式反应(Eric-PCR)。结果 创伤弧菌阳性率为10.4%(31/298),河弧菌为5.0%(15/298);用PCR法检测创伤弧菌毒力溶血素基因vvhA全部阳性,vcgC/E和16S rRNA A/B分型结果显示,共有CB型、EA型和CA型3种基因型别。河弧菌毒力相关基因vfh、toxR全部阳性,hupO携带率为60.0%(9/15)、vfp携带率为80.0%(12/15);Eric-PCR扩增出8~14条100~2 000 bp之间的条带,将15株河弧菌在相似系数为0.8处分为5个群11个类型。结论 广州市水产品中创伤弧菌和河弧菌污染情况较严重,大部分菌株携带毒力基因,Eric-PCR结果显示15株河弧菌在亲缘关系上具有相关性,应加强防控。

    Abstract:

    Objective To investigate the contamination, virulence-associated genes and molecular typing of Vibrio vulnificus and Vibrio fluvibrio in aquatic products of Guangzhou City. Methods Vibrio vulnificus and Vibrio fluvibrio suspected isolates were further identified by VITEK-2 system and polymerase chain reaction (PCR). The virulence-associated genes of the Vibrio isolates were determined, and genotyping analysis was performed by enterobacterial repetitive intergenic consensus-polymerase chain reaction (Eric-PCR). Results The positive rates were 10.4% (31/298) and 5.0% (15/298) for Vibrio vulnificus and Vibrio fluvibrio. Three genotypes of Vibrio vulnificus were detected, including CB, EA and CA. The virulence-associated genes vfh and toxR of Vibrio fluvibrio were all positive, the detection rate of hupO was 60.0% (9/15) and vfp was 80.0% (12/15). Eric-PCR amplified 8-14 bands between 100-2 000 bp, and 15 Vibrio fluvibrio strains were divided into 5 groups and 11 types with a similarity coefficient of 0.8. Conclusion The contamination of Vibrio vulnificus and Vibrio fluvibrio in aquatic products in Guangzhou was serious, and most virulence-associated genes were present. Eric-PCR result showed that 15 Vibrio vulnificus strains were related to each other in genetic relationship, so prevention and control should be strengthened.

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张晶,和鹏,周勇,陶霞,白志军,吴新伟.2018年广州市水产品中创伤弧菌和河弧菌检测分析[J].中国食品卫生杂志,2019,31(6):570-573.

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  • 收稿日期:2019-10-12
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  • 在线发布日期: 2020-01-14
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