[Multiresistant pathogens--a challenge for clinicians]

Area of Science:

• Infectious Diseases
• Microbiology
• Pharmacology

Context:

• Gram-negative pathogens frequently cause invasive nosocomial infections, posing significant therapeutic challenges due to antimicrobial resistance.
• While combination antibiotic therapy is often not indicated, it is recommended for critically ill patients (septic shock) and immunocompromised individuals with prior intensive care and broad-spectrum antibiotic exposure.

Purpose:

• To outline evidence-based recommendations for antibiotic therapy in Gram-negative nosocomial infections.
• To emphasize the importance of individualized treatment strategies based on infection source, local resistance patterns, patient factors, and organ function.
• To highlight the necessity of rapid initiation of appropriate antimicrobial therapy and subsequent de-escalation.

Summary:

• Combination antibiotic therapy for Gram-negative infections should be guided by infection source, local resistance data, patient history, and organ function.
• Prompt initiation of therapy post-microbiological sampling, optimized dosing based on pharmacokinetic/pharmacodynamic principles, and de-escalation are critical.
• The lack of new antibiotics necessitates rational and restrictive use of existing agents like carbapenems and polymyxins.

Impact:

• Optimizing antibiotic selection and de-escalation strategies can improve patient outcomes and combat antimicrobial resistance.
• This approach ensures the continued efficacy of essential antibiotics against multidrug-resistant Gram-negative pathogens.
• Provides a framework for clinicians managing complex Gram-negative infections in vulnerable patient populations.