フルオロキノロン系抗生物質の概要：作用機序、例、用途

Fluoroquinolones are a class of synthetic antibiotics with broad-spectrum activity, effective against both gram-negative and gram-positive bacteria. They are widely used in treating various bacterial infections, including urinary tract infections, respiratory infections, gastrointestinal infections, and skin infections2.

Mechanism of Action
Fluoroquinolones work by inhibiting bacterial enzymes such as DNA gyrase and topoisomerase IV, which are essential for DNA replication and transcription. This dual targeting disrupts bacterial DNA processes, leading to cell death.

Spectrum of Activity
These antibiotics are particularly effective against pathogens like Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, Staphylococcus aureus, and Streptococcus pneumoniae. Some fluoroquinolones also show activity against atypical bacteria like Mycoplasma pneumoniae and Chlamydia pneumoniae.

Clinical Applications
Fluoroquinolones are used for:

Treating complicated infections where other antibiotics may not be effective.

Managing mixed infections involving multiple bacterial strains.

Achieving high tissue penetration for infections in difficult-to-reach areas.

Risks and Resistance
While highly effective, fluoroquinolones carry risks such as tendinopathy, neuropathy, and Clostridioides difficile infections. Resistance can develop through bacterial mutations that alter enzyme binding sites

#Fluoroquinolones