Legionella pneumophila Urinary Antigen

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Turnaround Time: 1 - 3 days
CPT Code:


Test Type: 5 mL Urine
Reference Range:

No Legionella pneumophila serogroup 1 antigen detected


Confirm the diagnosis of Legionella pneumophila serogroup 1 infection.

This test will not detect species or serogroups other than Legionella pneumophila serogroup 1.

Legionella pneumophila has been estimated to cause 80% to 85% of Legionella infections, with serogroup 1 accounting for most of these. Current methods of diagnosis for Legionella infection include culture and DFA. All of these other tests require a high quality respiratory specimen to perform this test and, unfortunately, many patients with Legionella infection do not produce sputum. A number of investigators have shown that a specific soluble antigen was present in the urine of patients with Legionnaires' disease, which can be detected both early and late in the disease.

Berdal PP, Farshy CE, Feelley JC. Detection of Legionella pneumophila antigen in urine by enzyme-linked immunospecific assay. J Clin Microbiol. 1979 May; 9(5):575-578. PubMed 383744

Kohler RB, Zimmerman SE, Wilson E, et al. Rapid immunoassay diagnosis of Legionnaires' disease: Detection and partial characterization of urinary antigen. Ann Intern Med. 1981 May; 94(5):601-605. PubMed 7235392

Reingold AL, Thomason BM, Brake BJ, Thacker L, Wilkinson HW, Kuritsky JN. Legionella pneumonia in the United States: The distribution of serogroups and species causing human illness. J Infect Dis. 1984 May; 149(5):819. PubMed 6726009

Collection Details:

Collection Instructions:

Sterile screw-cap container.