Infection Control Strategies to Prevent Emergence and Transmission of Resistant Gram-Negative Bacteria

Area of Science:

• Infectious Diseases
• Public Health
• Microbiology

Background:

• Multidrug-resistant gram-negative bacteria (MDRGN) present a critical threat to patient safety.
• Efficient transmission in healthcare settings and rising antimicrobial resistance exacerbate the problem.
• Key MDRGN pathogens include extended-spectrum β-lactamase-producing Enterobacterales (ESBL-E), carbapenem-resistant Enterobacterales (CRE), carbapenem-resistant Pseudomonas aeruginosa (CRPA), and carbapenem-resistant Acinetobacter baumannii (CRAB).

Purpose of the Study:

• To synthesize current epidemiology of key MDRGN pathogens.
• To identify critical reservoirs for MDRGN transmission.
• To review evidence-based prevention strategies for MDRGN infections.

Main Methods:

• Literature review synthesizing data on MDRGN epidemiology, reservoirs, and prevention.
• Analysis of core interventions such as hand hygiene, contact precautions, environmental cleaning, and antimicrobial stewardship.
• Evaluation of selective roles for active surveillance and patient cohorting.
• Inclusion of emerging tools like whole-genome sequencing for transmission dynamics.

Main Results:

• Core prevention strategies include rigorous hand hygiene, targeted contact precautions, enhanced environmental cleaning, and robust antimicrobial stewardship programs.
• Active surveillance and patient cohorting are valuable in specific contexts based on organism, setting, and local resistance levels.
• Whole-genome sequencing offers advanced insights into transmission patterns, aiding outbreak investigations.

Conclusions:

• Effective control of MDRGN requires a multi-faceted approach combining fundamental infection control practices with targeted strategies.
• Antimicrobial stewardship is crucial to mitigate resistance development.
• Advanced molecular tools enhance understanding and response to MDRGN outbreaks.