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Cystic Fibrosis: Diagnosis and TreatmentDiagnosis:%u2022 Sweat chloride testing (gold standard)%u2022 Genetic testing for CFTR gene mutations%u2022 Chest X-ray or CT (may show bronchiectasis)Common lung infections:%u2022 Staphylococcus aureus (children)%u2022 Pseudomonas aeruginosa (adults)%u2022 Haemophilus influenzaeTreatment:%u2022 Chest physiotherapy%u2022 Bronchodilators%u2022 Dornase alfa and hypertonic saline (reduce mucus viscosity)%u2022 Pancreatic enzyme replacement%u2022 Antibiotics for chronic infections%u2022 Lung transplantation for respiratory failure