Characterization of the population structure, drug resistance mechanisms and plasmids of the community-associated Enterobacter cloacae complex in China

The Journal of Antimicrobial Chemotherapy
Kai ZhouYonghong Xiao

Abstract

To investigate the population structure, drug resistance mechanisms and plasmids of community-associated Enterobacter cloacae complex (CA-ECC) isolates in China. Sixty-two CA-ECC isolates collected from 31 hospitals across China were typed by hsp60 typing and MLST. ESBL and AmpC-overexpression phenotype was determined by double-disc synergy test. Replicon typing and conjugation were performed for plasmid analysis. All ESBL-positive isolates and representative conjugants were subjected to detailed characterization by WGS. Enterobacter hormaechei and Enterobacter kobei were predominant in our collections. MLST distinguished 46 STs with a polyclonal structure. ST591 was the most prevalent clone detected in northern China. Twenty-two isolates (35.5%) were ESBL positive and half of them were E. kobei. ESBL positivity was related to ESBL production (15/22) and to AmpC overexpression (18/22). Core-genome phylogenetic analysis identified intra- and inter-regional dissemination of ESBL-producing E. kobei clones. ESBL producers were exclusively classified as E. hormaechei and E. kobei, and blaCTX-M-3 was the most prevalent ESBL genotype (10/15) detected in four different environments. In the ESBL-positive population, the ESBL producers e...Continue Reading

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Citations

Nov 13, 2018·The Journal of Antimicrobial Chemotherapy·Beiwen ZhengXiaohui Song
Jul 19, 2019·Clinical Microbiology Reviews·Anne Davin-RegliJean-Marie Pagès
Feb 29, 2020·Infection and Drug Resistance·Jian-Jun GouBei-Wen Zheng
Oct 23, 2020·Microbial Drug Resistance : MDR : Mechanisms, Epidemiology, and Disease·Miriam MateosRafael Cantón
Jul 6, 2021·JAC-antimicrobial Resistance·Amy J Mathers, James S Lewis
Jul 2, 2021·Japanese Journal of Infectious Diseases·Jayathilake SarangiYoshichika Arakawa

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