Inclusion Criteria:
- Affiliate with or beneficiary of the French national single-payer health insurance system
- Patient capable of spontaneous mucus expectoration
- Consulting or hospitalized at the study centre
Inclusion Criteria for the Asthma Group
- Never- or former-smoker (<10 pack-years)
- Medical history compatible with asthma
- Reversible post-brochodilator (or post-corticosteroid test) ventilatory obstruction (ratio of forced expiratory volume in 1 second : forced vital capacity < 70%) or significant variation in respiratory function -- OR -- Bronchial hyperresponsiveness demonstrated during a broncho-provocation test
Inclusion Criteria for the COPD Group
- Current- or former-smokers (>10 pack years)
- Chronic obstructive pulmonary disease according to GOLD criteria
Inclusion Criteria for the Bronchiectasis Group
- Presence of bronchiectasis on computed tomography scan
- Cystic fibrosis has been ruled out
Exclusion Criteria:
- Patient expresses opposition to the protocol
- Breast feeding or pregnant
- Metastatic neoplastic disease
- Other active pulmonary disease (tuberculosis, interstitial lung disease)
- Recent psychiatric disorder (in the past year and documented via a specialist consult)
- Consumption of illicit drugs or alcoholism
- Patients in an exclusion period determined by another study
- Patients under any type of legal guardianship
- Prisoners
- Impossible to correctly inform the patient
- Does not fluently read French
- Emergency situations