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Severe liver abscess infections caused by hypervirulent clonal-group CG23 Klebsiella pneumoniae have been increasingly reported since the mid-1980s. Strains typically possess several virulence factors including an integrative, conjugative element ICEKp encoding the siderophore yersiniabactin and genotoxin colibactin. Here we investigate CG23's evolutionary history, showing several deep-branching sublineages associated with distinct ICEKp acquisitions. Over 80% of liver abscess isolates belong to sublineage CG23-I, which emerged in ~1928 following acquisition of ICEKp10 (encoding yersiniabactin and colibactin), and then disseminated globally within the human population. CG23-I's distinguishing feature is the colibactin synthesis locus, which reportedly promotes gut colonisation and metastatic infection in murine models. These data show circulation of CG23 K. pneumoniae decades before the liver abscess epidemic was first recognised, and provide a framework for future epidemiological and experimental studies of hypervirulent K. pneumoniae. To support such studies we present an open access, completely sequenced CG23-I human liver abscess isolate, SGH10.

Titel:	Population genomics of hypervirulent Klebsiella pneumoniae clonal-group 23 reveals early emergence and rapid global dissemination.
Autor/in / Beteiligte Person:	Lam, MMC ; Wyres, KL ; Duchêne, S ; Wick, RR ; Judd, LM ; Gan, YH ; Hoh, CH ; Archuleta, S ; Molton, JS ; Kalimuddin, S ; Koh, TH ; Passet, V ; Brisse, S ; Holt, KE
Link:	Full Text Finder (Volltext)
Zeitschrift:	Nature communications, Jg. 9 (2018-07-13), Heft 1, S. 2703
Veröffentlichung:	[London] : Nature Pub. Group, 2018
Medientyp:	academicJournal
ISSN:	2041-1723 (electronic)
DOI:	10.1038/s41467-018-05114-7
Schlagwort:	Americas epidemiology Animals Asia epidemiology Bacterial Translocation Europe epidemiology Gene Transfer, Horizontal Humans Klebsiella pneumoniae classification Klebsiella pneumoniae isolation & purification Liver microbiology Liver pathology Liver Abscess, Pyogenic microbiology Liver Abscess, Pyogenic pathology Lung microbiology Lung pathology Mice Mice, Inbred C57BL Peptides genetics Peptides metabolism Phenols metabolism Phylogeography Polyketides metabolism Spleen microbiology Spleen pathology Thiazoles metabolism Virulence Virulence Factors biosynthesis Whole Genome Sequencing Genome, Bacterial Klebsiella pneumoniae genetics Klebsiella pneumoniae pathogenicity Liver Abscess, Pyogenic epidemiology Phylogeny Virulence Factors genetics
Sonstiges:	Nachgewiesen in: MEDLINE Sprachen: English Publication Type: Journal Article; Research Support, Non-U.S. Gov't Language: English [Nat Commun] 2018 Jul 13; Vol. 9 (1), pp. 2703. <i>Date of Electronic Publication: </i>2018 Jul 13. MeSH Terms: Genome, Bacterial* ; Phylogeny* ; Klebsiella pneumoniae / genetics ; Klebsiella pneumoniae / pathogenicity ; Liver Abscess, Pyogenic / epidemiology ; Virulence Factors / genetics ; Americas / epidemiology ; Animals ; Asia / epidemiology ; Bacterial Translocation ; Europe / epidemiology ; Gene Transfer, Horizontal ; Humans ; Klebsiella pneumoniae / classification ; Klebsiella pneumoniae / isolation & purification ; Liver / microbiology ; Liver / pathology ; Liver Abscess, Pyogenic / microbiology ; Liver Abscess, Pyogenic / pathology ; Lung / microbiology ; Lung / pathology ; Mice ; Mice, Inbred C57BL ; Peptides / genetics ; Peptides / metabolism ; Phenols / metabolism ; Phylogeography ; Polyketides / metabolism ; Spleen / microbiology ; Spleen / pathology ; Thiazoles / metabolism ; Virulence ; Virulence Factors / biosynthesis ; Whole Genome Sequencing References: Nat Chem. 2015 May;7(5):411-7. (PMID: 25901819) ; Clin Microbiol Infect. 2014 Nov;20(11):O818-24. 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Population genomics of hypervirulent Klebsiella pneumoniae clonal-group 23 reveals early emergence and rapid global dissemination.