Investigation of genomic and pathogenicity characteristics of Streptococcus suis ST1 human strains from Guangxi Zhuang Autonomous Region (GX) between 2005 and 2020 in China

Streptococcus suis is a significant and emerging zoonotic pathogen. ST1 and ST7 strains are the primary agents responsible for S. suis human infections in China, including the Guangxi Zhuang Autonomous Region (GX). To enhance our understanding of S. suis ST1 population characteristics, we conducted an investigation into the phylogenetic structure, genomic features, and virulence levels of 73 S. suis ST1 human strains from GX between 2005 and 2020. The ST1 GX strains were categorized into three lineages in phylogenetic analysis. Sub-lineage 3-1a exhibited a closer phylogenetic relationship with the ST7 epidemic strain SC84. The strains from lineage 3 predominantly harboured 89K-like pathogenicity islands (PAIs) which were categorized into four clades based on sequence alignment. The acquirement of 89K-like PAIs increased the antibiotic resistance and pathogenicity of corresponding transconjugants. We observed significant diversity in virulence levels among the 37 representative ST1 GX strains, that were classified as follows: epidemic (E)/highly virulent (HV) (32.4%, 12/37), virulent plus (V+) (29.7%, 11/37), virulent (V) (18.9%, 7/37), and lowly virulent (LV) (18.9%, 7/37) strains based on survival curves and mortality rates at different time points in C57BL/6 mice following infection. The E/HV strains were characterized by the overproduction of tumour necrosis factor (TNF)-α in serum and promptly established infection at the early phase of infection. Our research offers novel insights into the population structure, evolution, genomic features, and pathogenicity of ST1 strains. Our data also indicates the importance of establishing a scheme for characterizing and subtyping the virulence levels of S. suis strains.

Medienart:

E-Artikel

Erscheinungsjahr:

2024

Erschienen:

2024

Enthalten in:

Zur Gesamtaufnahme - volume:13

Enthalten in:

Emerging microbes & infections - 13(2024), 1 vom: 18. Apr., Seite 2339946

Sprache:

Englisch

Beteiligte Personen:

Kang, Weiming [VerfasserIn]
Wang, Mingliu [VerfasserIn]
Yi, Xueli [VerfasserIn]
Wang, Jianping [VerfasserIn]
Zhang, Xiyan [VerfasserIn]
Wu, Zongfu [VerfasserIn]
Wang, Yan [VerfasserIn]
Sun, Hui [VerfasserIn]
Gottschalk, Marcelo [VerfasserIn]
Zheng, Han [VerfasserIn]
Xu, Jianguo [VerfasserIn]

Links:

Volltext

Themen:

89K-lke PAIs
Journal Article
ST1
Streptococcus suis
TNF-α
Virulence
Virulence Factors

Anmerkungen:

Date Completed 23.04.2024

Date Revised 26.04.2024

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1080/22221751.2024.2339946

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM37067720X