The alveoli are filled with exudate. The air is displaced, converting the lung into a solid organ. This description suggests-
Chronic bronchitis
Bronchial asthma
Bronchiectasis
Lobar pneumonia
• ‘Bacterial invasion of the lung parenchyma causes the alveoli to be filled with an inflammatory exudate, thus causing consolidation (“solidification”) of the pulmonary tissue’…..Robbins definition of pneumonia