台州市食源性沙门菌耐药性、毒力因子及分子分型研究
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(1.台州市疾病预防控制中心,浙江 台州 318000;2.浙江省疾病预防控制中心,浙江 杭州 310051)

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沈伟伟 男 主管技师 研究方向为食源性致病菌 E-mail:shengo8899@126.com

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台州市科技资金资助项目(111KY10)


Antimicrobial resistance and molecular characterization of the Salmonella isolates from food in Taizhou
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(Taizhou Center for Disease Control and Prevention,Zhejiang Taizhou 318000,China)

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    摘要:

    了解台州市食品中分离的沙门菌耐药性、毒力因子以及基因分型情况,建立食源性沙门菌的分子特征本底信息,为食源性疾病的防治提供技术支撑。方法 对近几年从食品中分离的22株沙门菌进行12种抗生素药敏试验、10种毒力基因PCR检测、脉冲电场凝胶电泳(PFGE)基因分型,用BioNumerics 5.0软件对分型数据进行聚类分析。结果 22株食源性沙门菌的总耐药率为59.1%,耐药率居前三位的抗生素分别是复方新诺明(36%)、四环素(27%)、萘啶酸(27%);所有菌株均检出6种以上毒力因子,1株肠炎沙门菌存在毒力岛、质粒及噬菌体等多种毒力因子;PFGE分型共得到21个条带,可分为5个基因型别,包括18种指纹图谱,各基因型别间同源性小于70%。结论 台州市食源性沙门菌存在致病风险,建立的指纹图谱数据库可为食源性疾病的防治提供技术支持。

    Abstract:

    To investigate the antimicrobial resistance and molecular characterization of Salmonella isolates from food in Taizhou, establish the molecular characteristics background of foodborne Salmonella, and provide science basis for foodborne diseases prevention and control. Methods 22 Salmonella strains isolated from food in recent years were tested for 12 kinds of antibiotics susceptibility and were screened for 10 potential virulence factors by polymerase chain reaction. All strains were genotyped by PFGE and analyzed with BioNumerics 5.0 software. Results The general resistant rate of 22 Salmonella strains was 59.1%. The strains were most resistant to co-trimoxazole (36%), tetracycline (27%) and nalidixic acid (27%). All strains were detected more than 6 kinds of virulence factors. One strain of S.enteritidis was found harboring virulence islands, plasmid and phages. 21 bands were separated by PFGE, which could be divided into five genotypes including 18 kinds of fingerprints. The homology between genotypes was less than 70%. Conclusion Foodborne Salmonella could be a food risk, and the fingerprint databases could provide technical supports for foodborne disease prevention and control.

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沈伟伟,裘丹红,盛莹,罗芸.台州市食源性沙门菌耐药性、毒力因子及分子分型研究[J].中国食品卫生杂志,2013,25(4):315-323.

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  • 收稿日期:2013-04-18
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  • 在线发布日期: 2013-09-08
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