Keyword Analysis & Research: pathophysiology of lobar pneumonia


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What are the histological findings of lobar pneumonia?

Micrograph of lobar pneumonia, H&E stain. Lobar pneumonia usually has an acute progression. Classically, the disease has four stages: Congestion in the first 24 hours: This stage is characterized histologically by vascular engorgement, intra-alveolar fluid, small numbers of neutrophils, often numerous bacteria.

What are the 4 stages of lobar pneumonia?

Lobar pneumonia has 4 classical stages of inflammatory response if left untreated, namely: Congestion/consolidation in the first 24 hours in which the lungs are heavy, red, and, boggy. Microscopically characterized by vascular engorgement and intra-alveolar edema.

What is lobular pneumonia?

Lobular pneumonia is a form of pneumonia characterized by inflammatory exudate within the intra-alveolar space resulting in consolidation that affects a large and continuous area of the lobe of a lung. It is one of three anatomic classifications of pneumonia (the other being bronchopneumonia and atypical pneumonia ).

What is the incidence of lobar pneumonia?

Pneumonia is the most common cause of death due to infectious diseases in the United States, with an incidence of 11.6 per 1000 persons/year reported in one study 4. Incidence is higher at the extremes of age. The presentation of lobar pneumonia depends on the severity of the disease, host factors and the presence of complications.


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