Epidemiological, phenotypic and genotypic characteristics difference of hypervirulent and carbapenem-resistant Klebsiella pneumoniae with different capsular serotypes.

IF 4.5 2区医学 Q2 IMMUNOLOGY

Journal of Microbiology Immunology and Infection Pub Date : 2025-02-28 DOI:10.1016/j.jmii.2025.02.010

Cong Zhou, Wencai Ke, Hui Zhang, Maosuo Xu, Baoyu Yuan, Yong Lin, Fang Shen

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引用次数: 0

Abstract

Background: KL1, KL2 CR-hvKP and KL64, KL47 hv-CRKP all exhibit overlapping multidrug resistance and hypervirulence phenotypes, but the differences in epidemiological, phenotypic and genotypic characteristics between them remains unclear.

Methods: In this study, we collected non-repeated hv-CRKP/CR-hvKP isolates in a tertiary hospital in Shanghai, China from January 2019 to December 2022. Furthermore, we selected four typical hypervirulent and carbapenem-resistant Klebsiella pneumoniae, including ST23-KL1/ST86-KL2 CR-hvKP (WYKP3 and WYKP194) and ST11-KL64/ST11-KL47 hv-CRKP (WYKP589 and WYKP188), and tried to clarify and compare their differences in virulence and drug resistance characteristics and plasmid distribution.

Results: Our study found that ST23-KL1 and ST86-KL2 CR-hvKP exhibited less plasmid diversity than that of ST11-KL64 and ST11-KL47 hv-CRKP. Compared with ST11-KL64 and ST11-KL47 hv-CRKP, ST23-KL1/ST86-KL2 CR-hvKP harbored significantly fewer antimicrobial resistance genes but more virulence genes, which contributed to the higher virulence of these strains and exhibited resistance to fewer antibiotics. ST11-KL64 hv-CRKP has emerged as the most prevalent hypervirulent and carbapenem-resistant Klebsiella pneumoniae probably due to its clonal transmission within hospitals as well as the transmission of virulence plasmids with the help of conjugative resistance plasmids.

Conclusions: Due to the different evolutionary mechanisms of hypervirulent and carbapenem-resistant Klebsiella pneumoniae with different capsular serotypes, the epidemiological, phenotypic and genotypic characteristics of KL1, KL2 CR-hvKP and KL64, KL47 hv-CRKP are different.

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来源期刊

Journal of Microbiology Immunology and Infection IMMUNOLOGY-INFECTIOUS DISEASES

CiteScore

15.90

自引率

5.40%

发文量

159

审稿时长

67 days

期刊介绍： Journal of Microbiology Immunology and Infection is an open access journal, committed to disseminating information on the latest trends and advances in microbiology, immunology, infectious diseases and parasitology. Article types considered include perspectives, review articles, original articles, brief reports and correspondence. With the aim of promoting effective and accurate scientific information, an expert panel of referees constitutes the backbone of the peer-review process in evaluating the quality and content of manuscripts submitted for publication.