Ciprofloxacin interactions with imipenem and amikacin against multiresistant Pseudomonas aeruginosa

Area of Science:

• Microbiology
• Pharmacology
• Infectious Diseases

Background:

• Pseudomonas aeruginosa is a significant opportunistic pathogen.
• Antibiotic resistance in P. aeruginosa is a growing clinical concern.
• Combination therapy is explored to overcome resistance.

Purpose of the Study:

• To evaluate in vitro interactions between ciprofloxacin and two other antibiotics.
• To assess the impact of these combinations on resistant Pseudomonas aeruginosa strains.

Main Methods:

• Killing-curve technique was employed.
• Tested against 26 Pseudomonas aeruginosa strains.
• Evaluated interactions of ciprofloxacin with imipenem and amikacin.

Main Results:

• Imipenem demonstrated synergistic killing with ciprofloxacin in 11 out of 26 strains.
• Amikacin showed enhanced killing with ciprofloxacin in only 4 strains.
• Interactions varied among the tested Pseudomonas aeruginosa isolates.

Conclusions:

• Imipenem shows potential as a potentiating agent for ciprofloxacin against certain P. aeruginosa strains.
• The efficacy of antibiotic combinations is strain-dependent.
• Further research into synergistic antibiotic combinations is warranted for resistant P. aeruginosa.