Detection of Pseudomonas Aeruginosa in the Airways of Patients With CF

Inclusion Criteria: * Patients with CF aged 18 years and above colonized with P. aeruginosa * Normal subjects ages 18 and above without CF or p. aeruginosa Exclusion Criteria: * for patients and volunteers will include the presence of asthma, allergic rhinitis, pregnancy, a history of gastric or duodenal ulcer, smoking, and a baseline FEV1 less than 60% of predicted normal value and a pulmonary exacerbation within the last 2 weeks as defined by use of systemic antibiotic