» Respiratory system: emphysema and edema

Lobular, interlobular, and subpleural pulmonary emphysema caused by bronchial obstruction. The causes can be of the following origins:
– viral (BRSV, IBR)
– bacterial (Mannheimia)
– parasitic (Dictyocaulosis)
– allergic (from hay or pasture)
– agonal causes (in the absence of accessory lung lesions and associated with terminal frothy edema)
Terminal frothy edema is evident in the trachea, a frequent agonal lesion without diagnostic significance, often associated with terminal emphysema.