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.