Rapid diagnosis of Legionnaires' disease using an immunochromatographic assay for Legionella pneumophila serogroup 1 antigen in urine during an outbreak in the Netherlands.

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.