Early Radiographic and Tomographic Manifestations of Legionnaires' Disease

Canadian Association of Radiologists Journal - Tập 68 Số 3 - Trang 328-333 - 2017
R. Poirier1, Jean‐Paul Rodrigue1, Jasmin Villeneuve2, Yves Lacasse3
1Département de radiologie, Centre hospitalier universitaire de Québec, Université Laval, Québec City, Québec, Canada
2Direction régionale de santé publique de la Capitale-Nationale, Québec City, Québec, Canada
3Centre de recherche, Centre de pneumologie, Institut universitaire de cardiologie et de pneumologie de Québec, Université Laval, Québec City, Québec, Canada

Tóm tắt

PurposeLegionnaires' disease (LD) may occur sporadically or in the course of outbreaks, where the typical radiological manifestations of the disease may better be delineated. We took advantage of a rare community-based epidemic of LD (181 patients) that occurred in 2012 in Quebec City, Canada, to describe the radiographic features of LD and compare the its tomographic presentation with that of community-acquired pneumonia caused by common bacteria other than Legionella pneumophila.MethodsFrom the 181 individuals affected in the outbreak, we obtained the chest radiographs of 159 individuals (mean 63 ± 15 years of age) for detailed analysis; 33 patients had a computed tomography (CT) scan performed during the course of their illness. In a case-control study, we compared the CT scans of patients with LD with those of patients who had received a diagnosis of community-acquired pneumonia caused by a pathogen other than Legionella and confirmed by chest CT scan.ResultsOverall, LD most often presented as an airspace consolidation involving 1 of the lower lobes. Pleural effusion and mediastinal adenopathies were apparent only in a minority, whereas no pneumothorax or cavitation was noted. We did not find any significant difference in chest CT scan findings in patients with LD vs those with community-acquired pneumonia from other bacterial origin. No radiological finding was clearly associated with an increased risk of intensive care unit admission or mortality.ConclusionsThe early radiographic and tomographic manifestations of LD are nonspecific and similar to those found in community-acquired pneumonia from other bacterial origin.

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Canadian Association of Radiologists Journal

Tập 68 Số 3

328-333

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