感染创面相关环境标本分离葡萄球菌的同源性分析
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赵雪涛

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R181.3+2

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Homology analysis on Staphylococcus isolated from infectious woundrelated environmental specimens
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    摘要:

    目的对某医疗机构葡萄球菌感染情况进行持续监测,对创面感染患者相关医源性环境检出的葡萄球菌进行分子溯源分析。方法采用实时荧光聚合酶链反应(PCR)和分类培养鉴定相结合的方法,对该医疗机构5例创面感染患者相关的医源性环境进行采样检测,并进行金黄色葡萄球菌多位点序列分析和MecA基因的分型分析。结果采集医源性环境标本71份,葡萄球菌阳性26份(36.62%),其中23份检出甲氧西林耐药(MecA+)株(88.46%,23/26)。金黄色葡萄球菌甲氧西林耐药株占77.78%(7/9),凝固酶阴性葡萄球菌甲氧西林耐药株占95.00%(19/20)。多位点序列分析结果显示,分离的金黄色葡萄球菌以ST239为主(6株);SCCMec分析,金黄色葡萄球菌以Ⅲ型为主,凝固酶阴性葡萄球菌以Ⅲ、Ⅳ型较多。结论医源性感染中葡萄球菌污染较多,且多为耐药株,应加强对耐药性葡萄球菌的持续监测,关注其变异对医疗机构医院感染的风险。

    Abstract:

    ObjectiveTo monitor Staphylococcus infection in a hospital, and trace the source of  Staphylococcus isolated from infectious woundrelated hospital environment by molecular analysis. MethodsBy combination of fluorescence quantitative polymerase chain reaction (FQPCR) and culture method, environmental specimens related to 5 patients with wound infection were taken and performed multilocus sequence  and MecA gene typing analysis. ResultsA total of 71 environmental specimens were taken, Staphylococcus accounted for 36.62%(n=26),88.46% (23/26 ) of which were MecA+ methicillinresistant strains. 77.78% (7/9)of  Staphylococcus aureus (S. aureus) and 95.00%(19/20)of coagulase negative Staphylococcus (CNS) were  methicillinresistant strains. Multilocus sequence analysis revealed that ST239 (n=6) was the most common sequence type in S. aureus;Staphylococcal cassette chromosome mec (SCCmec)   analysis showed that the major type of S. aureus was type Ⅲ, and CNS were type Ⅲ and Ⅳ. ConclusionStaphylococcus is common in healthcareassociated infection, and most Staphylococcus are multidrugresistant, continuous monitor on drugresistant Staphylococcus is necessary, and risk of Staphylococcus variant to medical institutes need to be paid attention.

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张越文,钱子煜,倪斌君,等.感染创面相关环境标本分离葡萄球菌的同源性分析[J]. 中国感染控制杂志,2014,13(6):327-331. DOI:10.3969/j. issn.1671-9638.2014.06.002.
ZHANG Yuewen, QIAN Ziyu, NI Binjun, et al. Homology analysis on Staphylococcus isolated from infectious woundrelated environmental specimens[J]. Chin J Infect Control, 2014,13(6):327-331. DOI:10.3969/j. issn.1671-9638.2014.06.002.

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  • 收稿日期:2013-12-20
  • 最后修改日期:2014-02-12
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  • 在线发布日期: 2014-06-30
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