北京市人源性单核细胞增生李斯特菌耐药特征及分子分型研究
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(北京市疾病预防控制中心营养与食品卫生所 食物中毒诊断溯源技术北京市重点实验室,北京 100013)

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王丽丽 女 主管技师 研究方向为食源性疾病E-mail:wangll4585@163.com通信作者:┣┣(中)通信作者┫┫陈倩 女 主任技师 研究方向为病原微生物实验室检测E-mail:cchenqian@263.net

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国家卫生和计划生育委员会公益性行业科研专项(201302005);首都卫生科研发展专项(2014-4-1013);北京市预防研究中心公益应用类课题(2014-BJYJ-10)


Molecular subtyping and antibiotic resistance of Listeria monocytogenes isolated from patients in Beijing
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(Institute for Nutrition and Food Hygiene,Beijing Center for Disease Prevention and Control, Beijing Key Laboratory of Diagnostic and Traceability Technologies for Food Poisoning,Beijing Center for Disease Prevention and Control,Beijing 100013,China)

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    摘要:

    研究北京市人源性单核细胞增生李斯特菌的血清学分型、耐药及分子特征。方法 对2013—2015年北京市李斯特菌病专项监测中分离的32株单核细胞增生李斯特菌进行PCR法血清学分型和PFGE分型,并采用CLSI和EUCAST推荐的微量肉汤稀释法检测菌株对12种抗生素的敏感性。结果 32株单核细胞增生李斯特菌共分为4种血清型,其中位居前2位的血清型是1/2b和1/2a,分别为17株和12株,4b血清型2株,1/2c血清型1株。32株菌经Asc I酶切共分为23种PFGE带型,分为4个簇,相同血清型李斯特菌的PFGE带型聚集成簇,两种分型方法一致性为93.75%(30/32)。32株单核细胞增生李斯特菌均对青霉素、氨苄西林、复方新诺明及红霉素敏感,大部分菌株对其他8种抗生素的MIC值较小,但有少数菌株对苯唑西林和四环素的MIC值较大,高达32、64 μg/ml。结论 北京市人源性单核细胞增生李斯特菌血清型以1/2b和1/2a为主,PFGE图谱与血清学分型存在一定相关性,耐药率普遍较低,但需加强耐药趋势监测。

    Abstract:

    To study the subtyping, antimicrobial resistances and molecular characteristics of Listeria monocytogenes isolated from patients in Beijing.Methods 32 strains isolated from patients from 2013 to 2015 were characterized by serotyping with PCR, pulsed field gel electrophoresis (PFGE) and antimicrobial susceptibility testing. Results 32 Listeria monocytogenes isolates included 4 serotypes of 1/2b (17 strains), 1/2a (12 strains), 4b (2 strains) and 1/2c (1 strains). Digested by Asc I, 23 PFGE patterns were identified and divided into 4 clusters. The PFGE patterns of the same Listeria serotype were in the same cluster. The consistency of the two classification methods was 93.75% (30/32). All strains were sensitive to penicillin, ampicillin, sulfamethoxazole and erythromycin. Most of the strains had low MIC values to the other 8 kinds of antibiotics, but a few strains had high MIC values to oxacillin and tetracycline, even to 32 or 64 μg/ml.Conclusion The dominant serotypes of Listeria monocytogenes isolated from patients in Beijing were 1/2b and 1/2a. There were some correlations between serotypes and PFGE patterns. Resistance rate was low, but more attention should be paid to the resistance trend monitoring.

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王丽丽,陈倩.北京市人源性单核细胞增生李斯特菌耐药特征及分子分型研究[J].中国食品卫生杂志,2016,28(4):426-430.

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  • 收稿日期:2016-04-11
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  • 在线发布日期: 2016-08-18
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