This is a Phase 2, double-blind, randomized, placebo-controlled study to evaluate the safety, tolerability, and efficacy of AP-PA02 administered by inhalation. This study will evaluate AP-PA02 administration in stable NCFB (non-cystic fibrosis bronchiectasis) patients. Subjects will either be included in Cohort A or Cohort B. For Cohort A, subjects will be randomized to receive either inhaled AP-PA02 or placebo. Cohort A will include individuals with NCFB and confirmed chronic P. aeruginosa infection but not on chronic inhaled antibiotics. These individuals will receive wither AP-PA02 or placebo for 10 days twice a day.
Cohort B will include individuals who with NCFB and confirmed P. aeruginosa infection but who are on chronic antibiotics. These individuals will receive either AP-PA02 or placebo for 10 days plus their current inhaled antibiotics for 28 days.