NCIt definition : Acute inflammation of the walls of the terminal bronchioles that spreads into the
peribronchial alveoli and alveolar ducts. It results in the creation of foci of consolidation,
which are surrounded by normal parenchyma. It affects one or more lobes, and is frequently
bilateral and basal. It is usually caused by bacteria (e.g., Staphylococcus, Streptococcus,
Haemophilus influenzae). Signs and symptoms include fever, cough with production of
brown-red sputum, dyspnea, and chest pain.;
Alternative definition : FDA: Acute inflammation of the walls of the terminal bronchioles.;