检验医学 ›› 2025, Vol. 40 ›› Issue (6): 551-554.DOI: 10.3969/j.issn.1673-8640.2025.06.006

• 论著 • 上一篇    下一篇

内蒙古呼伦贝尔地区苯唑西林敏感MRSA耐药性和分子流行病学分析

孙刚, 孙辉(), 包丽娜, 刘先伟, 路明洋, 刘静, 田媛   

  1. 内蒙古林业总医院 内蒙古民族大学第二临床医学院检验科,内蒙古 牙克石 022150
  • 收稿日期:2023-11-26 修回日期:2024-07-30 出版日期:2025-06-30 发布日期:2025-07-01
  • 通讯作者: 孙辉
  • 作者简介:孙 辉,E-mail:sunhui7360771@163.com
    孙 刚,男,1982年生,硕士,副主任检验师,主要从事细菌耐药监测和机制研究。
  • 基金资助:
    内蒙古自治区卫生健康委员会医疗卫生科技计划项目(202201607)

Drug resistance and molecular epidemiology of OS-MRSA in Hulunbuir,Inner Mongolia

SUN Gang, SUN Hui(), BAO Lina, LIU Xianwei, LU Mingyang, LIU Jing, TIAN Yuan   

  1. Department of Clinical Laboratory,Inner Mongolia Forestry General Hospital,the Second Clinical Medical School of Inner Mongolia Minzu University,Yakeshi 022150,Inner Mongolia,China
  • Received:2023-11-26 Revised:2024-07-30 Online:2025-06-30 Published:2025-07-01
  • Contact: SUN Hui

摘要:

目的 分析内蒙古呼伦贝尔地区苯唑西林敏感耐甲氧西林金黄色葡萄球菌(OS-MRSA)耐药性和分子流行病学特征。方法 收集2015—2021年呼伦贝尔地区5家医疗机构临床分离的金黄色葡萄球菌,根据体外药物敏感性试验结果筛选耐甲氧西林金黄色葡萄球菌(MRSA)、甲氧西林敏感金黄色葡萄球菌(MSSA)。采用聚合酶链反应(PCR)检测MSSA菌株mecAmecC,筛选OS-MRSA。对OS-MRSA菌株进行多位点序列分型(MLST)和葡萄球菌A蛋白(Spa)分型。结果 呼伦贝尔地区OS-MRSA检出率为1.20%。OS-MRSA对替加环素、莫西沙星、利奈唑胺、苯唑西林、头孢西丁、利福平、万古霉素的敏感性为100.00%,对青霉素的耐药率为100.00%,对红霉素、复方磺胺甲噁唑、庆大霉素、克林霉素、四环素、环丙沙星和左氧氟沙星等呈不同程度耐药。Spa分型检出10种型别,MLST分型检出8种型别。结论 呼伦贝尔地区未发现OS-MRSA优势型别,整体呈散发存在。实验室常规耐药表型检测方法易将OS-MRSA错误地鉴定为MSSA,应联合mecAmecC基因检测和耐药表型检测降低OS-MRSA漏检率。

关键词: 苯唑西林敏感耐甲氧西林金黄色葡萄球菌, 耐甲氧西林金黄色葡萄球菌, 耐药性, 分子分型

Abstract:

Objective To analyze the drug resistance and molecular epidemiological characteristics of oxacillin-sensitive methicillin-resistant Staphylococcus aureus(OS-MRSA) in Hulunbuir,Inner Mongolia. Methods Staphylococcus aureus isolated clinically from 5 medical institutions in Hulunbuir from 2015 to 2021 were collected. Methicillin-resistant Staphylococcus aureus(MRSA) and methicillin-sensitive Staphylococcus aureus(MSSA) were screened based on the results of in vitro drug susceptibility test. The mecA and mecC of MSSA were determined by polymerase chain reaction(PCR),and the OS-MRSA isolates were screened out. Multilocus sequence typing(MLST) and Staphylococcus protein A typing(Spa) were performed. Results The determination rate of OS-MRSA in Hulunbuir was 1.20%. The sensitivities of OS-MRSA to tigecycline,moxifloxacin,linezolid,oxacillin,cefoxitin,rifampicin and vancomycin were 100.00%,the penicillin resistance rate was 100.00%,and OS-MRSA was resistant to erythromycin,sulfamethoxazole,gentamicin,clindamycin,tetracycline,ciprofloxacin and levofloxacin to varying degrees. Spa determined 10 types,and MLST determined 8 types. Conclusions No dominant type of OS-MRSA has been found in Hulunbuir,and it is sporadic overall. The conventional drug resistance phenotypic determination methods are prone to wrongly identify OS-MRSA as MSSA. The determination of mecA and mecC genes and drug resistance phenotypic determination should be combined to reduce the missed determination rate of OS-MRSA.

Key words: Oxacillin-sensitive methicillin-resistant Staphylococcus aureus, Methicillin-resistant Staphylococcus aureus, Drug resistance, Molecular typing

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