Figure 1
From: Characterization of the extent of a large outbreak of Legionnaires’ disease by serological assays
Selection of eligible patients for the serological evaluation study. Only individuals with ≥2 paired sera were selected for this study (grey boxes). Non-LD patients and healthy controls formed the non-cases. Also shown are the serological results for the 116 CAP patients with negative Legionella culture, PCR, and/or UAT. Four LD cases (three diagnosed with UAT during the acute phase and one with positive serology and negative UAT) were admitted to other hospitals in Norway and are not included in the figure. CAP: community-acquired pneumonia. UAT: Legionella urinary antigen test. LD: Legionnaires’ disease (confirmed by Legionella culture, PCR and/or UAT). Non-LD: CAP of non-Legionella aetiology.