title: Sporadic cases versus outbreak associated cases of Legionella pneumonia.
abstract: Sporadic cases and outbreaks of Legionella pneumonia are more commonly recognized; especially among hospitalized patients. Factors predisposing to L. pneumophila pneumonia and the clinical features of this type of pneumonia are similar for epidemic and sporadic cases. It is difficult to compare overall mortality figures of various epidemics and series of sporadic community-acquired cases of Legionella pneumonia, because the factors that determine the severity and outcome of Legionella pneumonia are poorly defined in most series.
mesh_terms: D004196:Disease Outbreaks; D006801:Humans; D007877:Legionnaires' Disease / Q000453:epidemiology* / Q000209:etiology; D011014:Pneumonia / Q000453:epidemiology*