Stages of pneumonia
I. Congestion – lobes are heavy, red and boggy;
histologically, vascular congestion can be seen with
proteinaceous fluid, scattered neutrophils and many
bacteria in the alveoli.
II. Red hepatization – alveolar spaces are packed with
neutrophils, red cells, and fibrin, pleura – fibrinous
or fibrinopurulent exudate.
III. Gray hepatization – lung is … Read more