The number of eosinophils in the sputum samples of non-asthmatic<unk>  patients are similar to those of patients with asthma. In the sputum samples of those with NAEB, histamine and prostaglandin D2 is increased. This suggests that the superficial airways have significant mast cell activation and this may lead to the differing symptom presentation compared to asthma. Inflammation caused by eosinophils is associated with an increased cough reflex. In another study, however, some follow-up patients who were asymptomatic also had increased eosinophils in their sputum, indicating that the inflammation is not always associated with an increased cough reflex. The cause of the inflammation can be associated with environmental triggers or common allergens such as dust, chloramine, latex, or welding fumes.
Eosinophilic bronchitis
Plastic bronchitis
Mineral dust airway disease
Acute eosinophilic pneumonia
Bronchiectasis
Eosinophilic pneumonia
Acute bronchitis
Diffuse panbronchiolitis