Outcomes of adults with cystic fibrosis infected with antibiotic-resistant Pseudomonas aeruginosa

Noah Lechtzin, Majnu John, Rafael Irizarry, Christian Merlo, Gregory B. Diette, Michael P. Boyle

Research output: Contribution to journalArticlepeer-review

89 Scopus citations


Background: Although Pseudomonas aeruginosa is the most common bacterial infection in adults with cystic fibrosis and frequently develops resistance to multiple classes of antibiotics, it has not been determined whether patients with multiple antibiotic-resistant Pseudomonas aeruginosa have worse clinical outcomes than patients with more susceptible strains. Objectives: This study assessed the impact of multiply-resistant P. aeruginosa on lung function, hospitalizations, antibiotic use, lung transplantation and survival in adults with cystic fibrosis. Methods: In a cohort study at a university-based adult cystic fibrosis program, 75 consecutive adult cystic fibrosis patients who had P. aeruginosa isolated from sputum cultures were studied over a 4-year period. Outcomes included decline in FEV 1, clinic visits, hospitalizations, courses and days of intravenous antibiotics, and lung transplantation. Multiple linear and Poisson regression for repeated measures were used to assess the outcomes. Results: In comparison to patients with susceptible strains, patients with resistant P. aeruginosa had more severe baseline lung disease, more rapid decline in FEV 1 (160 ml/year, p = 0.003) and were significantly more likely to undergo lung transplantation (17.6 vs. 0%, p = 0.005). Conclusions: Infection with multiple-antibiotic-resistant P. aeruginosa is associated with accelerated progression of cystic fibrosis, and has important implications for infection control strategies, antibiotic use and lung transplantation.

Original languageEnglish (US)
Pages (from-to)27-33
Number of pages7
Issue number1
StatePublished - Feb 2006


  • Antibiotic resistance
  • Cystic fibrosis
  • Outcomes
  • Pseudomonas aeruginosa
  • Pulmonary function

ASJC Scopus subject areas

  • Pulmonary and Respiratory Medicine


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