title: Demonstration of the Legionnaires' disease bacillus in hilar lymph nodes.
mesh_terms: D001419:Bacteria / Q000302:isolation & purification*; D006801:Humans; D007877:Legionnaires' Disease / Q000382:microbiology*; D008198:Lymph Nodes / Q000382:microbiology* / Q000473:pathology; D008264:Macrophages / Q000382:microbiology; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies