Bronchiectasis is a chronic, irreversible dilatation of the bronchi and bronchioles that can be caused by infectious or non-infectious factors. Common infectious causes include bacterial infections from pathogens like Pseudomonas aeruginosa, Hemophilus influenzae, and Staphylococcus aureus. Non-infectious causes include exposure to toxic substances, allergic bronchopulmonary aspergillosis, and primary ciliary dyskinesia. Symptoms include persistent cough, thick sputum production, shortness of breath, wheezing and clubbing of fingers. Diagnosis involves collecting a medical history, physical examination, blood tests, sputum examination and pulmonary function tests. Treatment options include