title: Neisseria catarrhalis empyema in an immunodeficient host.
mesh_terms: D000368:Aged; D001424:Bacterial Infections; D004653:Empyema / Q000209:etiology*; D006801:Humans; D008297:Male; D009343:Neisseria / Q000302:isolation & purification; D010996:Pleural Effusion / Q000382:microbiology