Legionnaires' diseases: state of the art.
D000818:Animals; D002642:Chick Embryo; D006089:Gram-Negative Anaerobic Bacteria / Q000302:isolation & purification; D006168:Guinea Pigs; D006801:Humans; D007877:Legionnaires' Disease / Q000453:epidemiology / Q000209:etiology*; D012141:Respiratory Tract Infections / Q000209:etiology*; D014481:United States