Agents of Last Resort: An Update on Polymyxin Resistance

Area of Science:

• Microbiology
• Infectious Diseases
• Pharmacology

Background:

• Polymyxin antibiotics are critical last-line treatments for multidrug-resistant gram-negative bacterial infections.
• The emergence and spread of polymyxin resistance pose a significant global public health challenge.
• Limited therapeutic options exist for infections caused by pathogens resistant to other antibiotics.

Purpose of the Study:

• To highlight the critical threat of polymyxin resistance in gram-negative pathogens.
• To emphasize the need for a comprehensive approach to combat polymyxin resistance.
• To underscore the importance of understanding resistance mechanisms and risk factors.

Main Methods:

• This study is a review and synthesis of current knowledge on polymyxin resistance.
• It examines the mechanisms driving resistance and associated risk factors.
• It discusses strategies for infection prevention, stewardship, and optimized polymyxin dosing.

Main Results:

• Polymyxin resistance is increasing, jeopardizing the efficacy of these essential last-line antibiotics.
• Effective management requires a multifaceted strategy.
• Optimizing polymyxin dosing, including combination regimens, is a key consideration.

Conclusions:

• Combating polymyxin resistance necessitates a thorough understanding of its mechanisms and risk factors.
• Implementing robust infection prevention and antimicrobial stewardship programs is essential.
• Strategic optimization of polymyxin use, including combination therapies, is crucial for preserving their effectiveness.