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Test Code LAG Urine Legionella Antigen

Infectious

Specimen and Container/Tube

Specimen Type: Urine

Preferred Specimen: Sterile, sealable, screw-cap container

Other Acceptable specimens: Urine grey-top tube

Volume

Minimum Volume: 4 mL

Specimen Stability

Storage Temperature

Stability

Room temperature

(20 - 25°C)

24 hours

Refrigerated

(2 - 10°C)

 14 days

Frozen

(-20°C)

 14 days

Collection Instructions

Specimen Collection: Early morning, clean catch urine is best.
Specimen Transport: Immediate

Specimen Handling and Transport Instructions

UCMC Onsite Instructions: Collect specimen per standard collection procedure and send to laboratory immediately. 

 

UCMC Offsite and UC MedLab Outreach Instructions: Collect specimen per standard collection procedure and send to laboratory immediately. If transport is delayed, refrigerate specimens prior to transport.

Rejection Criteria

  • Common specimen rejected situations include: incorrect specimen type, insufficient volume, incorrect collection container, missing or incomplete specimen identifiers, incorrect specimen transport, or specimens outside stability limits. 
  • Room temperature specimens greater than 24 hours will be rejected.
  • Specimens in preservatives other than boric acid will be rejected.

Reference Values

 

Test

Age

Sex

Reference Range
L. pneumophila serogroup 1 antigen

All

All

Not Detected

Turnaround Time

Turnaround times are relative to the time the specimen is received in the test laboratory. 

STAT Turnaround Time: not available

Routine Turnaround Time: 24 horus

Testing Schedule: Monday - Sunday

Clinical Indications

  • Aid in the presumptive diagnosis of Legionella infection (Legionnaires’ Disease) caused by L.  pneumophila serogroup 1 in conjunction with culture and other methods.
  • The test cannot be used on environmental specimens (i.e. potable water).
  • This test will not detect infections caused by other L. pneumophila serogroups and by other Legionella species.

CPT Codes

87449

LOINC Codes

30687449

Methodology

Immunochromatographic assay

Synonyms/Keyword Search

LEGIONELLA URINE

Last Review Date

10/02/2025