pulmonary infections Flashcards
(11 cards)
most common cause of death in viral influenza epidemics is superimposed bacterial pneumonia
true
predisposing chronic diseases for community-acquired bacterial pneumonia
- congestive heart failure
- COPD
- diabetes
patterns of anatomic distribution in community-acquired bacterial pneumonia
- bronchopneumonia: patchy consolidation of the lung
- lobar pneumonia: large portion of a love or of an entire love defines lobar pneumonia
community-acquired bacterial pneumonias
4 stages of inflammatory response in lobar pneumonia
- congestion
- red hepatization
- gray hepatization
- resolution
vascular engorgement, intra-alveolar edema fluid containing few neutrophils, presence of bacteria which may be numerous
congestion
lobe is red, firm, airless with liver-like consistency
red hepatization
massive confluent exudation as neutrophils, red cells, and fibrin fill the alveolar spaces
red hepatization
progressive disintegration of red cells and persistence of fibrinosuppurative exudate–> change to graysin-brown color
gray hepatization
may be confined to one lobe but is often multilobar and bilateral and basal because of secretions to the lower lobes
bronchopneumonia
well-developed lesions are slightly elevated, dry, granular, gray-red to yellow, poorly delimited at their margins
bronchopneumonia
histological reaction with neutrophil-rich exudate that fills the bronchi, bronchioles and adjacent alveolar spaces
bronchopneumonia
