Legionella by the legion.
D000368:Aged; D000818:Animals; D001424:Bacterial Infections / Q000453:epidemiology; D002648:Child; D004196:Disease Outbreaks / Q000453:epidemiology; D005260:Female; D006801:Humans; D007875:Legionella / Q000302:isolation & purification; D007877:Legionnaires' Disease / Q000453:epidemiology / Q000209:etiology; D008297:Male; D008875:Middle Aged; D006113:United Kingdom; D014481:United States; D014871:Water Microbiology