Cited by 118Antimicrobial Resistance in StaphylococcusBacterial Genetics and BiotechnologyBacterial biofilms and quorum sensing

Small colony variants (SCVs) of Staphylococcus aureus – A bacterial survival strategy

Kahl, Barbara C.·2014·Infection, Genetics and Evolution

Abstract

Small colony variants (SCVs) of Staphylococcus aureus have been implicated in chronic recurrent infections and have therefore gained renewed interest during the last decade. Moreover, SCVs have been shown to be part of the regular growth cycle, are highly dynamic or stable and can be selected during various harsh conditions. As such, the emergence of SCVs has been described not only in human, but also in veterinary medicine as well as in food microbiology. SCVs are characterized by impaired growth, down-regulation of genes for metabolism and virulence, while sigB and genes important for persistence and biofilm formation are up-regulated. Furthermore, SCVs are resistant to various antibiotics such as aminoglycosides, trimethoprim-sulfamethoxazole, fluorquinolones, fusidic acid or even to antiseptics such as triclosan. An underlying mechanism has been determined for hemin-, menadione- and thymidine-dependent SCVs as well as for SCVs which are impaired in their stress response. SCVs are optimized for persistence in the host. They are able to reverse and thereby constitute a highly dynamic subpopulation of S. aureus. Such phenotype switching constitutes an integral part of the infection process enabling the bacteria to hide inside the host cell without eliciting a strong host response.

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Authors
Kahl, B. C.
Affiliations
University Hospital Münster (DE)
Corresponding author
Kahl, Barbara C.
Venue
Infection, Genetics and Evolution
Publisher
Elsevier BV
Published
2014-01
Volume
21
Pages
515-522
ISSN
1567-1348 (ISSN-L)
OpenAlex
W2078268465
Cited by
118
References
100
Citations by year
2026: 5 · 2025: 7 · 2024: 8 · 2023: 5 · 2022: 8 · 2021: 9 · 2020: 9 · 2019: 11 · 2018: 11 · 2017: 14 · 2016: 10 · 2015: 11 · 2014: 7 · 2013: 3
FWCI
7.54
Type
journal article
Language
en
Open access
closed
Locations
  • Infection Genetics and Evolution (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Bundesministerium für Bildung und Forschung (0315829B)
  • Interdisziplinäres Zentrum für Klinische Forschung, Universitätsklinikum Würzburg (Kah2/024/09, SFTR34C7)
Topics
  • Health Sciences › Medicine › Infectious Diseases › Antimicrobial Resistance in Staphylococcus
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Bacterial Genetics and Biotechnology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Bacterial biofilms and quorum sensing
Keywords
small colony variants, Staphylococcus aureus, bacterial persistence, antibiotic resistance, phenotypic switching, SigB, biofilm formation, stress response, host cell survival, triclosan resistance, veterinary infections, food microbiology
MeSH terms
Anti-Bacterial Agents, Humans, Phenotype, Staphylococcal Infections, Staphylococcus aureus, Genetic Variation, Virulence, Gene Expression Regulation, Bacterial, Drug Resistance, Bacterial

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