Changes

**Parasites

**Parasites

**Allergens

**Allergens

**Metabolic activation of compounds by Clara cells in the bronchioles (eg: [[Lungs Inflammatory - Pathology#Acute bovine pulmonary emphysema and oedema (ABPEE)|Fog Fever in cattle]])

**Metabolic activation of compounds by Clara cells in the bronchioles (eg: [[Acute Bovine Pulmonary Emphysema and Oedema|Fog Fever in cattle]])

*Bronchioles are more susceptible to obstruction than bronchi and the epithelium is highly susceptible to injury due to [[Respiratory System General Introduction - Pathology#Bronchioles|changed anatomy]]

*Bronchioles are more susceptible to obstruction than bronchi and the epithelium is highly susceptible to injury due to [[Respiratory System General Introduction - Pathology#Bronchioles|changed anatomy]]

**Overinflation of other parts of the lung ([[Pulmonary Emphysema|emphysema]])

**Overinflation of other parts of the lung ([[Pulmonary Emphysema|emphysema]])

**Chronic cough

**Chronic cough

**[[Lungs Inflammatory - Pathology|Pneumonia]] following inhalation of inflammatory exudate/infectious material within it

**[[Pneumonia Overview|Pneumonia]] following inhalation of inflammatory exudate/infectious material within it

='''Infectious causes of bronchitis or bronchiolitis'''=

='''Infectious causes of bronchitis or bronchiolitis'''=