Fluoroquinolone resistance: Mechanisms, impact on bacteria, and role in evolutionary success

Liam S. Redgrave, Sam B. Sutton, Mark A. Webber, Laura J V Piddock

Research output: Contribution to journalReview articlepeer-review

666 Citations (Scopus)


Quinolone and fluoroquinolone antibiotics are potent, broad-spectrum agents commonly used to treat a range of infections. Resistance to these agents is multifactorial and can be via one or a combination of target-site gene mutations, increased production of multidrug-resistance (MDR) efflux pumps, modifying enzymes, and/or target-protection proteins. Fluoroquinolone-resistant clinical isolates of bacteria have emerged readily and recent data have shown that resistance to this class of antibiotics can have diverse, species-dependent impacts on host-strain fitness. Here we outline the impacts of quinolone-resistance mutations in relation to the fitness and evolutionary success of mutant strains.

Original languageEnglish
Pages (from-to)438-445
Number of pages8
JournalTrends in Microbiology
Issue number8
Early online date16 May 2014
Publication statusPublished - 1 Aug 2014


  • Chromosome structure
  • Fitness

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