Pulmonary Infections in the Immune Competent Host

Reference:

Kobzik L and Schoen FS. The Lung. In: Cotran RS, Kumar V, Robbins SL, eds. Robbins Pathologic Basis of Disease 5th ed. Philadelphia, Saunders Co; 1994.

Pnuemonia

Bacterial
Viral and
Mycoplasmal

Lung Abscesses
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There are three lobes in the right lung and two lobes in the left lung. The right main stem bronchus is more vertical than the left.

The entire tracheobronchial tree is lined by peseudostratified columnar epithelium. The bronchi have cartilage, smooth muscle and bronchial glands in their walls. Bronchioles lack cartilage and there are no bronchial glands in the wall. Branches of the pulmonary artery accompany the bronchi into the lung.

The pulmonary parenchyma consists of thin alveolar septa which are lined predominantly by Type I pneumocytes and sparse Type II pneumocytes. Alveolar septa are responsible for gas exchange.

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