Legionnaires' disease.
D000367:Age Factors; D000368:Aged; D000907:Antibodies, Bacterial / Q000032:analysis; D001419:Bacteria / Q000276:immunology / Q000302:isolation & purification; D001431:Bacteriological Techniques; D004196:Disease Outbreaks / Q000453:epidemiology; D004219:District of Columbia; D005455:Fluorescent Antibody Technique; D006801:Humans; D007877:Legionnaires' Disease / Q000453:epidemiology; D008168:Lung / Q000382:microbiology; D008824:Michigan; D010414:Pennsylvania; D012306:Risk; D013194:Staining and Labeling
D000907:Antibodies, Bacterial