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Treatment guidelines for multidrug-resistant Gram-negative microorganisms.

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New antimicrobials combat rising antimicrobial resistance, but treatment guidelines vary. Future guidelines need to incorporate novel therapies for challenging infections caused by resistant bacteria.

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Area of Science:

  • Infectious Diseases
  • Pharmacology
  • Microbiology

Background:

  • Increasing antimicrobial resistance necessitates new therapeutic options.
  • Several new antimicrobials, including beta-lactam/beta-lactamase inhibitor combinations and cefiderocol, have been introduced.
  • Existing treatment guidelines from professional societies (ESCMID, IDSA, SEIMC) address resistant pathogens but differ in recommendations.

Purpose of the Study:

  • To review current treatment guidelines for infections caused by multidrug-resistant microorganisms.
  • To highlight differences in recommendations among major professional societies.
  • To identify the need for updated guidelines incorporating novel antimicrobials and management strategies.

Main Methods:

  • Comparative analysis of treatment guidelines from ESCMID, IDSA, and SEIMC.
  • Identification of pathogens and resistance mechanisms covered by each guideline.
  • Assessment of recommendations for specific challenging pathogens like carbapenem-resistant Enterobacterales, Acinetobacter baumannii, Pseudomonas aeruginosa, and Stenotrophomonas maltophilia.

Main Results:

  • Guidelines address extended-spectrum beta-lactamase producers, carbapenem-resistant Enterobacterales, Acinetobacter baumannii, and Pseudomonas aeruginosa.
  • IDSA guidelines uniquely include recommendations for AmpC producers.
  • IDSA and SEIMC provide recommendations for Stenotrophomonas maltophilia treatment.

Conclusions:

  • Current guidelines offer varying approaches to treating infections caused by resistant bacteria.
  • There is a need for future guidelines to integrate newly available antimicrobials and innovative treatment options.
  • Harmonization and updates are crucial for effective management of challenging infections.