*Acute interstitial pneumonia is characterised by '''exudation into the alveolar lumen''' and in cattle is associated with [[Lungs Ventilation - Pathology#Emphysema|interstitial emphysema]]
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*Acute interstitial pneumonia is characterised by '''exudation into the alveolar lumen''' and in cattle is associated with [[Pulmonary Emphysema|interstitial emphysema]]