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Bacterial pathogens depend on precise and efficient DNA replication to sustain infection. Two type II topoisomerases—DNA gyrase and topoisomerase IV—are critical to this process, as they resolve DNA supercoiling and unlink chromosomes during replication. Fluoroquinolones, synthetic derivatives of quinolones, exploit this mechanism by stabilizing the transient DNA–enzyme cleavage complex, preventing strand religation, and causing lethal double-strand breaks. These...
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Anthelmintic drugs differ significantly from antiparasitic therapies targeting protozoa, primarily due to differences in parasite biology. Whereas most protozoal treatments act on proliferating cells, anthelmintics are typically directed against mature, nonproliferative helminths. The therapeutic approach considers the helminth's reliance on neuromuscular coordination, glucose metabolism, and microtubular integrity for survival, reproduction, and localization within the host. Most anthelmintics...
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Quinolone antimicrobial agents.

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Annual Review of Medicine
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This review covers fluoroquinolone antimicrobials, detailing their chemistry, use, and bacterial resistance. It highlights appropriate and inappropriate clinical applications for these important antibiotics.

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Area of Science:

  • Pharmacology
  • Microbiology
  • Clinical Medicine

Background:

  • Fluoroquinolones are a class of synthetic broad-spectrum antimicrobial agents.
  • Bacterial resistance to antibiotics is a growing global health concern.

Purpose of the Study:

  • To provide a comprehensive review of fluoroquinolone antimicrobial agents.
  • To examine the challenges posed by bacterial resistance to fluoroquinolones.
  • To detail the clinical applications and usage patterns of fluoroquinolones.

Main Methods:

  • Literature review of chemistry, microbiology, pharmacology, and clinical studies.
  • Analysis of data on bacterial resistance mechanisms.
  • Evaluation of clinical trial outcomes and usage guidelines.

Main Results:

  • Fluoroquinolones exhibit diverse chemical structures and mechanisms of action.
  • Bacterial resistance to fluoroquinolones is a significant clinical problem.
  • Appropriate and inappropriate uses of fluoroquinolones in various clinical settings were identified.

Conclusions:

  • Understanding fluoroquinolone properties is crucial for effective antimicrobial therapy.
  • Addressing bacterial resistance is essential for preserving fluoroquinolone efficacy.
  • Judicious use of fluoroquinolones is necessary to optimize patient outcomes and combat resistance.