Changes

**Mild catarrhal inflammation resolves in 7 days and the lung is back to normal within 3 weeks

**Mild catarrhal inflammation resolves in 7 days and the lung is back to normal within 3 weeks

**More severe inflammation becomes chronic with fibrosis or [[Bronchiectasis|bronchiectasis]]

**More severe inflammation becomes chronic with fibrosis or [[Bronchiectasis|bronchiectasis]]

**[[Lungs Inflammatory - Pathology#Pulmonary abscesses|Abscess]] formation with pyogenic bacteria

**[[Pulmonary Abscesses|Abscess]] formation with pyogenic bacteria

**'''Pleuritis''' in severe fibrinous pneumonia with adhesions

**'''Pleuritis''' in severe fibrinous pneumonia with adhesions

**Death in fulminating cases due to hypoxaemia and toxaemia

**Death in fulminating cases due to hypoxaemia and toxaemia