Drug resistance of linezolid-resistant Staphylococcus capitis and clinical characteristics of patients
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R446.5

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    Abstract:

    Objective To understand drug resistance mechanism and clinical characteristics of linezolid-resistant Staphylococcus capitis(LRSC). Methods LRSC isolated from a hospital was collected, homology of the strains was analyzed by pulsed-field gel electrophoresis(PFGE), 23S rRNA gene, rplC and rplD genes which encode ribosomal protein L3 and L4, as well as drug-resistant gene CFR were amplified by polymerase chain reaction(PCR), then sequenced. Results Seven strains of LRSC were isolated from specimens of 5 patients, strains were resistant to oxacillin, levofloxacin, gentamicin and other commonly used antimicrobial agents, only susceptible to glycopeptides, rifampicin, tetracycline and quinupristin/dalfopristin. 23S rRNA mutation were found in all 7 drug-resistant strains, all strains didn't carry CFR gene. PFGE showed that 7 clinical strains belonged to the same genotype. All 5 patients had serious underlying diseases, length of hospital stay of patients who isolated drug-resistant bacteria was 92 days to 10 months, 3 of whom indwelled deep venous catheters, 1 patient indwelled both deep venous catheter and dialysis catheter, and 3 patients received linezolid treatment. Conclusion Resistance of 7 strains of S. capitis to linezolid is due to G2576T and C2104T mutations in V region of 23S rRNA; LRSC showed multidrug-resistant phenotype, factors for drug-resistant bacterial infection may be patients with underlying diseases, prolonged length of hospital stay, long course of treatment with linezolid and indwelling deep vein catheter.

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方芳, 李雪寒, 李一荣.耐利奈唑胺头状葡萄球菌耐药性及患者临床特征[J].中国感染控制杂志英文版,2019,18(10):917-923. DOI:10.12138/j. issn.1671-9638.20195207.
FANG Fang, LI Xue-han, LI Yi-rong. Drug resistance of linezolid-resistant Staphylococcus capitis and clinical characteristics of patients[J]. Chin J Infect Control, 2019,18(10):917-923. DOI:10.12138/j. issn.1671-9638.20195207.

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History
  • Received:March 19,2019
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  • Online: October 28,2019
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