purulent pneumonia

pur·u·lent pneu·mo·ni·a

pneumonia caused by an organism that produces pus, implying that there can be destruction of lung tissue with permanent changes; usually sputum contains pus. Staphylococci, hemolytic streptococci , under streptococcus, and Friedländer bacillus are typical causes, as opposed to Streptococcus pneumoniae, which is rarely a cause of purulent pneumonia.
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Figure 6: Microscopic appearance of purulent pneumonia.