This is a prospective, multicenter open-label study in adults with CF who are colonized with NTM. Subjects will receive two 5-day infusion cycles of IV gallium. The study will evaluate the safety and antimycobacterial effect of two 5-day infusions of IV gallium. Subjects will be on study for up to 148 days, with a screening period of up to 7 days and active study period up to 20 days. About 40 people with CF who are 18 years of age or older will take part in this study at about 10 hospitals and clinics around the country.

The primary objective of this platform trial is to evaluate the efficacy and safety of differing treatments in CF pulmonary exacerbations during a planned 14 day course of IV antimicrobials. Primary efficacy will be evaluated as the difference in mean ppFEV1 (pulmonary function testing) changes from Visit 1 to Visit 2 (Day 28 ± 2 days) between intervention arms. The study will compare treatment of an intravenous aminoglycoside and β-lactams (AG) versus intravenous β-lactams only (non-AG) in people with CF diagnosed with a pulmonary exacerbation who will be treated for Pa.

This is a prospective, multicenter observational study to investigate clinical markers of nutritional status, physical frailty, and sarcopenia in adults with CF spanning a range of lung impairment and to identify barriers and risk factors to optimize nutrition and physical functioning in this patient population. Repeat measurements of body composition and physical function by various methods will be taken during the study and compared to clinical outcomes, as well as with each other. Smaller sub-set studies will be performed to assess bioimpedance analysis (BIA) and/or ultrasound as measures of body composition. Two cohorts matched by age, sex, race, and CFTR genotype severity will be enrolled: (1) those with FEV1 <60% and (2) those with FEV1 ≥60%.