IN VITRO COMPARATIVE ACTIVITY OF EIGHT ANTIPSEUDOMONAL AGENTS

Area of Science:

• Clinical Microbiology
• Infectious Diseases
• Antimicrobial Resistance

Background:

• Pseudomonas aeruginosa is a significant opportunistic pathogen.
• Antimicrobial resistance in P. aeruginosa poses a major healthcare challenge.
• Monitoring antibiotic susceptibility is crucial for effective treatment.

Purpose of the Study:

• To assess the antibiotic susceptibility patterns of P. aeruginosa strains from indoor patients.
• To identify antibiotics with varying efficacy against P. aeruginosa.
• To highlight potential differences in resistance rates based on isolate source.

Main Methods:

• Testing 530 P. aeruginosa isolates from indoor patients.
• Evaluating susceptibility against eight different antibiotics across three chemical groups.
• Analyzing resistance rates for each antibiotic tested.

Main Results:

• High resistance rates (38.0%-61.8%) observed for carbenicillin, piperacillin, and gentamicin.
• Lower resistance rates (7.8%-22.8%) noted for amikacin, ciprofloxacin, ceftazidime, netilmicin, and norfloxacin.
• Urinary isolates exhibited a notably higher rate of resistance.

Conclusions:

• Significant resistance to older antibiotics necessitates careful selection of treatment.
• Amikacin, ciprofloxacin, and other newer agents show promise against P. aeruginosa.
• Urinary tract infections caused by P. aeruginosa may require specific antibiotic strategies due to higher resistance.