The First Report of Escherichia coli and Klebsiella pneumoniae Strains That Produce Both NDM-5 and OXA-181 in Jiangsu Province, China

被引:5
作者
Tao, Guixiang [1 ]
Tan, Hua [2 ]
Chen, Qian [1 ]
机构
[1] Nanjing Med Univ, Childrens Hosp, Inst Pediat, Nanjing, Peoples R China
[2] Nanjing Med Univ, Childrens Hosp, Dept Clin Lab, Nanjing, Peoples R China
关键词
Escherichia coli; Klebsiella pneumoniae; NDM-5; OXA-181; plasmid; METALLO-BETA-LACTAMASE; RESISTANCE; EMERGENCE; CLONE; ST410;
D O I
10.2147/IDR.S412678
中图分类号
R51 [传染病];
学科分类号
100401 ;
摘要
Objective: The aim of this study was to analyze the genetic characteristics of three Enterobacteriaceae strains (one strain of Escherichia coli and two strains of Klebsiella pneumoniae) that produce both the NDM-5 and OXA-181 carbapenemases in pediatric patients. Methods: Carbapenem-resistant Enterobacteriaceae (CRE) strains were collected from the Children's Hospital Affiliated to Nanjing Medical University in 2022. Resistance genes were detected by PCR. CRE strains that produced both the blaNDM-5 and blaOXA-181 genes were further characterized by antimicrobial susceptibility testing, multilocus sequence typing (MLST), plasmid conjugation assay, S1 nuclease-PFGE, Southern blotting and whole-genome sequencing. Results: Three Enterobacteriaceae strains carrying both the bla(NDM-5) and bla(OXA-181) resistance genes were screened. MLST results showed that the strain of Escherichia coli carrying both bla(NDM-5) and bla(OXA-181) was ST410; the two strains of Klebsiella pneumoniae with both bla(NDM-5) and bla(OXA-181) were ST2601 and ST759. Conjugation assays showed that the plasmids harboring the bla(NDM-5) and bla(OXA-181) genes were self-transmissible. S1-PFGE and Southern blotting showed that the bla(NDM-5) and bla(OXA-181) genes were located on the plasmid with the size of about 60kb similar to. The genotyping results showed that the plasmid types were ColKP3 and IncX3. Conclusion: This is the first report of Enterobacteriaceae strains that produce both NDM-5 and OXA-181 isolated from pediatric patients in China. Active infection control measures are urgently needed to prevent the spread of bacteria in children.
引用
收藏
页码:3245 / 3255
页数:11
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