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Hypervirulent Klebsiella pneumoniae – clinical and molecular perspectives

Open access
Choby, J. E., Howard‐Anderson, J., Weiss, D. S.·2020·Journal of Internal Medicine

Abstract

Hypervirulent Klebsiella pneumoniae (hvKp) has emerged as a concerning global pathogen. hvKp is more virulent than classical K. pneumoniae (cKp) and capable of causing community‐acquired infections, often in healthy individuals. hvKp is carried in the gastrointestinal tract, which contributes to its spread in the community and healthcare settings. First recognized in Asia, hvKp arose as a leading cause of pyogenic liver abscesses. In the decades since, hvKp has spread globally and causes a variety of infections. In addition to liver abscesses, hvKp is distinct from cKp in its ability to metastasize to distant sites, including most commonly the eye, lung and central nervous system (CNS). hvKp has also been implicated in primary extrahepatic infections including bacteremia, pneumonia and soft tissue infections. The genetic determinants of hypervirulence are often found on large virulence plasmids as well as chromosomal mobile genetic elements which can be used as biomarkers to distinguish hvKp from cKp clinical isolates. These distinct virulence determinants of hvKp include up to four siderophore systems for iron acquisition, increased capsule production, K1 and K2 capsule types, and the colibactin toxin. Additionally, hvKp strains demonstrate hypermucoviscosity, a phenotypic description of hvKp in laboratory conditions that has become a distinguishing feature of many hypervirulent isolates. Alarmingly, multidrug‐resistant hypervirulent strains have emerged, creating a new challenge in combating this already dangerous pathogen.

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Metadata

Authors
Choby, J. E., Howard‐Anderson, J., & Weiss, D. S.
Venue
Journal of Internal Medicine
Publisher
Wiley
Published
2019-11-21
Volume
287
Issue
3
Pages
283-300
ISSN
  • 0954-6820 (ISSN-L)
  • 1365-2796
OpenAlex
W2987013299
Cited by
712
References
9
FWCI
12.66
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Hypervirulent Klebsiella pneumoniae – clinical and molecular perspectives. https://app.cochat.ai/papers/10.1111/joim.13007
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Choby, J. E., Howard‐Anderson, J., & Weiss, D. S. (2020). Hypervirulent Klebsiella pneumoniae – clinical and molecular perspectives. Journal of Internal Medicine. https://doi.org/10.1111/joim.13007

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