Legionella pneumophila is associated with outbreaks of either Pontiac fever, a self-limited influenzalike condition without pneumonia, or Legionnaires' disease, a severe pneumonic disease affecting elderly or immunocompromised individuals. An outbreak of both Legionnaires' disease and Pontiac fever after a point-source exposure to L pneumophila was studied. Our observations demonstrated the spectrum of illness that L pneumophila may cause and emphasized the importance of host factors in affecting the expression of infection.
(Arch Intern Med. 1993;153:2597-2599)
Thomas DL, Mundy LM, Tucker PC. Hot Tub LegionellosisLegionnaires' Disease and Pontiac Fever After a Point-Source Exposure to Legionella pneumophila. Arch Intern Med. 1993;153(22):2597–2599. doi:10.1001/archinte.1993.00410220113013