Definition
Bacterial pneumonia is an acute inflammation
and consolidation (exudate fills alveoli) of lung
tissue caused by bacteria.
Pneumonias may be classified according to etiology, host reaction or gross
anatomic distribution of the inflammation. Refer to Figure 15-16 in your textbook. Pathology
What is the difference between bronchopneumonia and
lobar pneumonia?
- Bronchopneumonia: Characterized by patchy foci of consolidation
(pus in many alveoli and adjacent air passages) scattered in one or more lobes of one or
both lungs. Refer to Figure 15-17 in your textbook.
- Lobar pneumonia:
Characterized by an acute inflammation of the entire lobe or lung. Histologically, tissue
changes are classified into four stages: congestion, red hepatization, gray hepatization
and resolution. Refer to Figures 15-19, 15-20 and 15-21 in your textbook.
Etiology/Pathogenesis
Varied and many. How do you contract pneumonia? What are the mechanisms by which
one develops pneumonia? Virulence versus defense.
Pathophysiology
What are the possible outcomes of pneumonia?
- Resolution
- Organization
- Abscess formation
- Empyema
- Bacteremia
- Death
