Pneumonia is defined as what?

Pneumonia is defined as what?

• A. Inflammatory infection of the alveoli and distal bronchioles in the lower respiratory tract
• B. Inflammation of the upper airways
• C. Infection of the pleura
• D. Viral infection of the lungs only

Answer: (A)

Pneumonia is an inflammatory infection of the lung parenchyma, specifically involving the alveoli and distal bronchioles in the lower respiratory tract. This means the air sacs where gas exchange occurs become inflamed and often filled with inflammatory exudate, leading to consolidation. It distinguishes itself from inflammation of the upper airways (which would be conditions like bronchitis or rhinitis) and from infection of the pleura (pleuritis). Also, pneumonia is not limited to viral causes; it can be bacterial, viral, or fungal, and centers on the alveolar spaces rather than the upper airways or pleural lining.

Pneumonia is an inflammatory infection of the lung parenchyma, specifically involving the alveoli and distal bronchioles in the lower respiratory tract. This means the air sacs where gas exchange occurs become inflamed and often filled with inflammatory exudate, leading to consolidation. It distinguishes itself from inflammation of the upper airways (which would be conditions like bronchitis or rhinitis) and from infection of the pleura (pleuritis). Also, pneumonia is not limited to viral causes; it can be bacterial, viral, or fungal, and centers on the alveolar spaces rather than the upper airways or pleural lining.