食源性产超广谱β-内酰胺酶大肠埃希菌的分布及其同源性研究
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宾羽琳

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R183.4 R378.2+1

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韶关市科技局科技研究资金(2014CX-K280)


Distribution and homology of foodborne-associated extendedspectrum β-lactamasesproducing Escherichia coli
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    摘要:

    目的了解不同食源性传播介质中产超广谱β-内酰胺酶(ESBLs)大肠埃希菌的分布情况及同源性。方法从2014—2015年韶关市不同来源的食源性样本中分离产ESBLs大肠埃希菌,采用脉冲场凝胶电泳(PFGE)技术和BioNumerics软件对菌株进行分型。结果347份不同来源的食源性样本中检出11株致腹泻大肠埃希菌和29株产ESBLs大肠埃希菌。PFGE图谱分析,29株菌可以分为21个聚类群,其中聚类A包含7株菌(J2、J3、J4、J7、J9、B4、S3),为优势的PFGE带型,聚类B有2株菌(J6、J8),其余菌株带型为分散克隆。3株健康从业人员分离菌(J2、J7、J9)相似系数为100%,生活饮用水分离菌(S3)与腹泻患者分离菌(B4)的相似系数为97.1%,S3菌与4株健康从业人员分离菌(J2、J3、J7、J9)相似系数均>90.0%。结论韶关市食源性产ESBLs大肠埃希菌在食品、水、动物和人群中广泛分布,并可能通过食物链相互传播,应加强监测,防止进一步扩散。

    Abstract:

    ObjectiveTo study the distribution and homology of foodborneassociated extendedspectrum βlactamases (ESBLs)producing Escherichia coli (E. coli).MethodsESBLsproducing E. coli were isolated from different food specimens in Shaoguan from 2014 to 2015, strains were typed with pulsedfield gel electrophoresis (PFGE) and BioNumerics software.Results11 strains of diarrheacausing E. coli and 29 strains of ESBLsproducing E. coli were isolated from 347 different sources of food specimens. PFGE analysis showed that 29 strains could be divided into 21 cluster groups, group A was predominant pattern, which included 7 strains(J2, J3, J4, J7, J9, B4, S3), group B included 2 strains (J6, J8), the other strains were sporadic clones. Similarity coefficient (SC) of 3 strains (J2, J7, J9) from health practitioners was 100%,SC of strains from drinking water and patients with diarrhea (B4) was 97.1%,SC of S3 strain and 4 strains (J2, J3, J7, J9) from health practitioners were all>90.0%.ConclusionFoodborneassociated ESBLsproducing E. coli are widely distributed in food, water, animal, and populations, and can be transmitted through food chain, surveillance should enhanced to avoid further spread.

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宾羽琳,王萌,陈艳,等.食源性产超广谱β-内酰胺酶大肠埃希菌的分布及其同源性研究[J]. 中国感染控制杂志,2016,15(12):907-912. DOI:10.3969/j. issn.1671-9638.2016.12.003.
BIN Yulin, WANG Meng, CHEN Yan, et al. Distribution and homology of foodborne-associated extendedspectrum β-lactamasesproducing Escherichia coli[J]. Chin J Infect Control, 2016,15(12):907-912. DOI:10.3969/j. issn.1671-9638.2016.12.003.

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  • 收稿日期:2016-03-01
  • 最后修改日期:2016-05-23
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  • 在线发布日期: 2016-12-30
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