| prevalence of legionellosis among adults: a study of community-acquired pneumonia in france. | over a 24-month period, 274 patients with community-acquired pneumonia were hospitalized in departments of medicine at hospitals in bordeaux, lyon, marseille, and toulouse. etiology of the pneumonia was determined either by organism identification or by indirect immunofluorescence in only 139 cases (51%). the most frequently isolated etiological agents were streptococcus pneumoniae (34 cases), legionella pneumophila (29 cases) and mycoplasma pneumoniae (24 cases). the majority of patients with l ... | 1987 | 3692603 |