检验医学 ›› 2026, Vol. 41 ›› Issue (8): 793-798.DOI: 10.3969/j.issn.1673-8640.2026.08.012

• 论著 • 上一篇    下一篇

临床无菌部位分离的沙门菌耐药和毒力特征

陈欣欣1, 郑雅文2, 许颖1, 尉景娟1, 李亚娜1, 陈硕1, 李涵嵋1, 孙伟1()   

  1. 1 首都医科大学附属北京友谊医院临床检验中心北京 100050
    2 首都儿科研究所附属儿童医院检验科北京 100020
  • 收稿日期:2025-01-18 修回日期:2025-08-09 出版日期:2026-08-30 发布日期:2026-08-24
  • 通讯作者: 孙 伟, E-mail:sunwei010512@163.com
  • 作者简介:陈欣欣,女,1987 年生,博士,主管技师,主要从事临床微生物感染诊断与致病机制研究。

Drug resistance and virulence characteristics of Salmonella isolated from sterile clinical sites

CHEN Xinxin1, ZHENG Yawen2, XU Ying1, WEI Jingjuan1, LI Yana1, CHEN Shuo1, LI Hanmei1, SUN Wei1()   

  1. 1 Center of Clinical LaboratoryBeijing Friendship Hospital,Capital Medical UniversityBeijing 100050, China
    2 Department of Clinical LaboratoryChildren's Hospital of Capital Institute of PediatricsBeijing 100020, China
  • Received:2025-01-18 Revised:2025-08-09 Online:2026-08-30 Published:2026-08-24

摘要:

目的 探讨无菌部位感染的沙门菌的耐药和毒力特征,为临床诊治提供参考。方法 收集2023年1月—2024年5月首都医科大学附属北京友谊医院分离自无菌部位体液样本(静脉血或胸腔积液)的沙门菌7株。采用质谱仪和全自动细菌鉴定药敏仪进行菌株鉴定和体外药物敏感性试验;采用血清凝集法进行血清学分型;采用聚合酶链反应(PCR)检测耐药基因和毒力基因,并进行测序。结果 7株沙门菌中,6株为肠炎沙门菌。多重耐药菌(MDR)检出率为28.57%(2/7)。沙门菌对三代头孢菌素类和磺胺类抗菌药物均敏感,对喹诺酮类、四环素类、青霉素类抗菌药物耐药或中介。共检出4种耐药基因,分别为blatemgyrAsul2和tetA,可介导对β-内酰胺酶类、喹诺酮类、磺胺类、四环素类抗菌药物的耐药;检出11种毒力基因,包括7种毒力岛基因(sipAsipCsopEinvHsseLmisLmgtC)、1种菌毛基因(fimA)和2种毒力质粒基因(spvBspvD)。结论 无菌部位分离的沙门菌存在多重耐药性,其携带的多种毒力基因可能与沙门菌侵袭性感染相关。

关键词: 沙门菌, 肠炎沙门菌, 耐药性, 毒力基因

Abstract:

Objective To investigate the drug resistance and virulence characteristics of Salmonella isolated from sterile clinical sites,and to provide a reference for clinical diagnosis and treatment. Methods Totally,7 Salmonella isolates were collected from sterile clinical site body fluid samples at Beijing Friendship Hospital of Capital Medical University from January 2023 to May 2024. The isolates were identified by mass spectrometry and automatic bacterial identification and drug susceptibility analyzer. Serological typing was performed by serum agglutination method. Drug resistance genes and virulence genes were determined by polymerase chain reaction(PCR) and sequenced. Results Among the 7 Salmonella isolates,6 isolates were Salmonella enteritidis. The determination rate of multi-drug resistance(MDR) bacteria was 28.57%(2/7). The Salmonella isolates were sensitive to third-generation cephalosporins and sulfonamides,but resistant or intermediate to quinolones,tetracyclines and penicillins. A total of 4 drug resistance genes were determined,including blatemgyrAsul2 and tetA,which could mediate resistance to beta-lactamases,quinolones,sulfonamides and tetracyclines. Totally,11 virulence genes were determined,including 7 pathogenicity island genes(sipAsipCsopEinvHsseLmisL and mgtC),1 fimbrial gene(fimA) and 2 virulence plasmid genes(spvB and spvD). Conclusions The Salmonella isolated from sterile clinical sites have MDR,and the multiple virulence genes carried by them may be related to the invasive infection of Salmonella.

Key words: Salmonella, Salmonella enteritidis, Drug resistance, Virulence gene

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