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Risk factors for bacteraemia attributable to Pseudomonas aeruginosa resistant to imipenem, levofloxacin, or

S Mikura1, H Wada, M Okazaki

  • 1Department of Respiratory Medicine, Kyorin University School of Medicine, Mitaka, Tokyo, Japan.

The Journal of Hospital Infection
|August 26, 2011
PubMed

Insights

Risk factors for antibiotic resistance in Pseudomonas aeruginosa were identified. Imipenem resistance linked to hospital transfer and antifungals; gentamicin resistance to penicillin use. Levofloxacin resistance had no clear risk factors.

Area of Science:

  • Medical Microbiology
  • Infectious Diseases
  • Clinical Pharmacy

Background:

  • Pseudomonas aeruginosa is an opportunistic pathogen frequently causing hospital-acquired infections.
  • Antimicrobial resistance in P. aeruginosa poses a significant threat to patient outcomes.
  • Understanding resistance mechanisms is crucial for effective treatment strategies.

Purpose of the Study:

  • To investigate risk factors associated with resistance to imipenem, levofloxacin, and gentamicin in Pseudomonas aeruginosa.
  • To identify patient-specific and treatment-related factors contributing to antimicrobial resistance.

Main Methods:

  • Retrospective analysis of 175 Pseudomonas aeruginosa isolates from blood cultures.
  • Case-control study design to identify risk factors for specific antibiotic resistance.
  • Data collection on patient demographics, hospital transfer status, and medication history.

Main Results:

  • Imipenem resistance was significantly associated with prior antifungal medication use and transfer from another hospital.
  • Previous administration of penicillin was identified as a risk factor for gentamicin resistance.
  • No statistically significant risk factors were found for levofloxacin resistance in this cohort.

Conclusions:

  • Hospital transfer and antifungal use are potential risk factors for imipenem resistance in Pseudomonas aeruginosa.
  • Penicillin exposure may be linked to gentamicin resistance, warranting further investigation.
  • Further research is needed to elucidate factors contributing to levofloxacin resistance in this pathogen.

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