Molecular eidemiology of carbapenem-resistant Enterobacter cloacae complex in a tertiary hospital in Shandong, China

BMC Microbiology

Research

Qiwen Cheng¹  Xiutao Dong²  Jiazheng Wang²  Shengnan Hu²  Xiaoning Zhang²  Wenyan Xie²  Huaiqi Jing³ 

[1] Biodesign Center for Health Through Microbiomes, Arizona State University, 85287, Tempe, AZ, USA;Department of Clinical Laboratory Medicine, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Medicine and Health Key Laboratory of Laboratory Medicine, Jinan, Shandong, China;State Key Laboratory for Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, 102206, Changping, Beijing, People’s Republic of China;

关键词: Enterobacter cloacae;    Carbapenemase;    NDM-5;    NDM-1;    ST171;    ST418;   

DOI  :  10.1186/s12866-023-02913-x

 received in 2022-11-01, accepted in 2023-06-27,  发布年份 2023

来源: Springer

【 摘 要 】

BackgroundThe increasing incidence and prevalence of carbapenem-resistant Enterobacter cloacae complex (CREC) poses great challenges to infection prevention and disease treatment. However, much remains unknown about the clinical characteristics of CREC isolates. Our objective was to characterize antimicrobial resistance and, carbapenemase production in CREC with 36 CREC isolates collected from a tertiary hospital in Shandong, China.ResultsThree types of carbapenemases (NDM, IMP and VIM) were detected in these isolates. Among them, NDM carbapenemases were most prevalent, with a 61.2% (22/36) detection rate for NDM-1, 27.8% (10/36) for NDM-5 and 2.8% (1/36) for NDM-7. IMP-4 was found in two isolates and VIM-1 in only one isolate. The MLST analysis identified 12 different sequence types (STs), of which ST171 (27.8%) was the most prevalent, followed by ST418 (25.0%). ST171 isolates had significantly higher rates of resistance than other STs to gentamicin and tobramycin (Ps < 0.05), and lower rates of resistance to aztreonam than ST418 and other STs (Ps < 0.05). Among 17 carbapenemase-encoding genes, the blaNDM−5 gene was more frequently detected in ST171 than in ST418 and other isolates (Ps < 0.05). In contrast, the blaNDM−1 gene was more frequently seen in ST418 than in ST171 isolates. One novel ST (ST1965) was identified, which carried the blaNDM−1 gene.ConclusionNDM-5 produced by ST171 and NDM-1 carbapenemase produced by ST418 were the leading cause of CREC in this hospital. This study enhances the understanding of CREC strains and helps improve infection control and treatment in hospitals.

【 授权许可】

CC BY   
© The Author(s) 2023

【 图 表 】

Fig. 3