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Daptomycin.

Mohsen Heidary1, Azar Dohkt Khosravi2,3, Saeed Khoshnood3

  • 1Department of Microbiology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.

The Journal of Antimicrobial Chemotherapy
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Summary
This summary is machine-generated.

Daptomycin resistance in Gram-positive bacteria is rising, particularly in Staphylococcus aureus and Enterococcus species. Factors like prolonged treatment and poor drug quality contribute to this emerging challenge.

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Area of Science:

  • Microbiology
  • Infectious Diseases
  • Pharmacology

Background:

  • Daptomycin is a crucial cyclic lipopeptide antibiotic for treating severe Gram-positive bacterial infections.
  • It functions by disrupting bacterial cell membrane integrity and inhibiting essential macromolecular synthesis.
  • While uncommon, daptomycin resistance is an increasing concern in key pathogens like Staphylococcus aureus and Enterococcus species.

Purpose of the Study:

  • To highlight the growing issue of daptomycin resistance in Gram-positive bacteria.
  • To identify key risk factors associated with the emergence of daptomycin-resistant strains.
  • To emphasize the urgent need for improved surveillance and diagnostic strategies.

Main Methods:

  • This study is a review of current literature and clinical observations regarding daptomycin resistance.
  • Analysis of reported cases and risk factors associated with resistance development.
  • Discussion of current and needed strategies for antimicrobial susceptibility testing and resistance monitoring.

Main Results:

  • Daptomycin resistance is increasingly reported in Staphylococcus aureus, Enterococcus faecium, and Enterococcus faecalis.
  • Resistance often emerges during prolonged treatments or in infections with high bacterial loads, but can occur without prior exposure.
  • Inadequate treatment regimens, inconsistent drug supply, and poor drug quality are significant risk factors.

Conclusions:

  • Urgent priorities include enhanced antimicrobial susceptibility testing for Gram-positive bacteria.
  • Improved communication between clinicians and laboratories is essential for effective resistance management.
  • Development of rapid diagnostics and robust surveillance systems are critical to combat daptomycin resistance.