Pseudomonas aeruginosa: resistance and therapy

Area of Science:

• Microbiology
• Infectious Diseases
• Pharmacology

Background:

• Pseudomonas aeruginosa antimicrobial resistance poses a critical therapeutic challenge.
• Resistance mechanisms can be intrinsic (chromosomal) or acquired (plasmid-mediated).
• Cellular and intracellular changes also influence P. aeruginosa's susceptibility to antibiotics.

Purpose of the Study:

• To review the factors influencing Pseudomonas aeruginosa antimicrobial resistance.
• To categorize antipseudomonal antibiotics based on their resistance potential.
• To guide the selection of appropriate antibiotics for P. aeruginosa infections.

Main Methods:

• Literature review of antimicrobial resistance mechanisms in P. aeruginosa.
• Analysis of in vitro activity and resistance potential of key antipseudomonal agents.
• Classification of antibiotics into high- and low-resistance potential categories.

Main Results:

• P. aeruginosa resistance is multifactorial, involving genetic and cellular alterations.
• Antibiotics like gentamicin, tobramycin, ciprofloxacin, ceftazidime, and imipenem exhibit high resistance potential.
• Amikacin, piperacillin, cefoperazone, cefepime, meropenem, and polymyxin B demonstrate low resistance potential.

Conclusions:

• Effective management of P. aeruginosa infections requires careful antibiotic selection.
• Considering the inherent resistance potential of antibiotics is vital for treatment success.
• Low-resistance potential antibiotics offer more durable therapeutic options against P. aeruginosa.