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Article: Genomic Investigation of Salmonella Typhi in Hong Kong Revealing the Predominance of Genotype 3.2.2 and the First Case of an Extensively Drug-Resistant H58 Genotype

TitleGenomic Investigation of Salmonella Typhi in Hong Kong Revealing the Predominance of Genotype 3.2.2 and the First Case of an Extensively Drug-Resistant H58 Genotype
Authors
KeywordsH58
Hong Kong
Salmonella Typhi
typhoid fever
XDR
Issue Date6-Mar-2023
PublisherMDPI
Citation
Microorganisms, 2023, v. 11, n. 3 How to Cite?
Abstract

Typhoid fever is a notable disease in Hong Kong. We noticed two local cases of typhoid fever caused by Salmonella Typhi within a two-week period in late 2022, which had no apparent epidemiological linkage except for residing in the same region of Hong Kong. A phylogenetic study of Salmonella Typhi isolates from Hong Kong Island from 2020 to 2022 was performed, including a whole-genome analysis, the typing of plasmids, and the analysis of antibiotic-resistance genes (ARGs), to identify the dominant circulating strain and the spread of ARGs. A total of seven isolates, from six local cases and an imported case, were identified from positive blood cultures in two hospitals in Hong Kong. Five antibiotic-sensitive strains of genotype 3.2.2 were found, which clustered with another 30 strains originating from Southeast Asia. Whole-genome sequencing revealed clonal transmission between the two index cases. The remaining two local cases belong to genotype 2.3.4 and genotype 4.3.1.1.P1 (also known as the H58 lineage). The genotype 4.3.1.1.P1 strain has an extensively drug-resistant (XDR) phenotype (co-resistance to ampicillin, chloramphenicol, ceftriaxone, ciprofloxacin, and co-trimoxazole). Although the majority of local strains belong to the non-H58 genotype 3.2.2 with a low degree of antibiotic resistance, the introduction of XDR strains with the global dissemination of the H58 lineage remains a concern.


Persistent Identifierhttp://hdl.handle.net/10722/339685
ISSN
2023 Impact Factor: 4.1
2023 SCImago Journal Rankings: 0.944
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLi, Xin-
dc.contributor.authorCao, Huiluo-
dc.contributor.authorChen, Jonathan Hon-Kwan-
dc.contributor.authorNg, Yuey-Zhun-
dc.contributor.authorFung, Ka-Kin-
dc.contributor.authorCheng, Vincent Chi-Chung-
dc.contributor.authorHo, Pak-Leung-
dc.date.accessioned2024-03-11T10:38:34Z-
dc.date.available2024-03-11T10:38:34Z-
dc.date.issued2023-03-06-
dc.identifier.citationMicroorganisms, 2023, v. 11, n. 3-
dc.identifier.issn2076-2607-
dc.identifier.urihttp://hdl.handle.net/10722/339685-
dc.description.abstract<p>Typhoid fever is a notable disease in Hong Kong. We noticed two local cases of typhoid fever caused by <em>Salmonella</em> Typhi within a two-week period in late 2022, which had no apparent epidemiological linkage except for residing in the same region of Hong Kong. A phylogenetic study of <em>Salmonella</em> Typhi isolates from Hong Kong Island from 2020 to 2022 was performed, including a whole-genome analysis, the typing of plasmids, and the analysis of antibiotic-resistance genes (ARGs), to identify the dominant circulating strain and the spread of ARGs. A total of seven isolates, from six local cases and an imported case, were identified from positive blood cultures in two hospitals in Hong Kong. Five antibiotic-sensitive strains of genotype 3.2.2 were found, which clustered with another 30 strains originating from Southeast Asia. Whole-genome sequencing revealed clonal transmission between the two index cases. The remaining two local cases belong to genotype 2.3.4 and genotype 4.3.1.1.P1 (also known as the H58 lineage). The genotype 4.3.1.1.P1 strain has an extensively drug-resistant (XDR) phenotype (co-resistance to ampicillin, chloramphenicol, ceftriaxone, ciprofloxacin, and co-trimoxazole). Although the majority of local strains belong to the non-H58 genotype 3.2.2 with a low degree of antibiotic resistance, the introduction of XDR strains with the global dissemination of the H58 lineage remains a concern.<br></p>-
dc.languageeng-
dc.publisherMDPI-
dc.relation.ispartofMicroorganisms-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.subjectH58-
dc.subjectHong Kong-
dc.subjectSalmonella Typhi-
dc.subjecttyphoid fever-
dc.subjectXDR-
dc.titleGenomic Investigation of Salmonella Typhi in Hong Kong Revealing the Predominance of Genotype 3.2.2 and the First Case of an Extensively Drug-Resistant H58 Genotype-
dc.typeArticle-
dc.identifier.doi10.3390/microorganisms11030667-
dc.identifier.scopuseid_2-s2.0-85151410677-
dc.identifier.volume11-
dc.identifier.issue3-
dc.identifier.eissn2076-2607-
dc.identifier.isiWOS:000958150900001-
dc.identifier.issnl2076-2607-

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