Rapid Diagnosis of Legionnaires' Disease Using an Immunochromatographic Assay for Legionella pneumophila Serogroup 1 Antigen in Urine during an Outbreak in The Netherlands

ABSTRACT A new immunochromatographic assay for rapid qualitative detection of Legionella pneumophila serogroup 1 antigen in urine specimens was used during an outbreak of legionellosis in The Netherlands. The assay seems of the utmost value in providing a rapid diagnosis of Legionnaires' disease in patients with severe community-acquired pneumonia in an outbreak setting.