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HelpOrder Code LAB5175 Legionella pneumophila (Legionnaires Disease), Antibody, Serum
Additional Codes
| Mayo Test ID |
|---|
| SLEG |
Reporting Name
Legionella Pneumophila Ab, SUseful For
Evaluating possible legionellosis (Legionnaires disease, Pontiac fever, extrapulmonary legionella infection caused by Legionella pneumophila)
Specimen Type
SerumSpecimen Required
Supplies: Sarstedt Aliquot Tube, 5 mL (T914)
Collection Container/Tube:
Preferred: Serum gel
Acceptable: Red top
Submission Container/Tube: Plastic vial
Specimen Volume: 0.5 mL
Collection Instructions: Centrifuge and aliquot serum into a plastic vial.
Specimen Minimum Volume
0.4 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Serum | Refrigerated (preferred) | 14 days |
| Frozen | 14 days |
Reject Due To
| Gross hemolysis | Reject |
| Gross lipemia | Reject |
| Heat-inactivated specimen | Reject |
Reference Values
Negative
Reference values apply to all ages.
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Day(s) Performed
Wednesday
Method Name
Enzyme-Linked Immunosorbent Assay (ELISA)
CPT Code Information
86713
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| SLEG | Legionella Pneumophila Ab, S | 7947-5 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| SLEG | Legionella Pneumophila Ab, S | 7947-5 |
Method Description
The Legionella kit is designed to detect IgG-, IgA-, and IgM-class antibodies to Legionella pneumophila in human sera. The test procedure involves 3 incubation steps:
1. Test sera (properly diluted) are incubated in multiwells coated with an inactivated, solubilized cocktail of L pneumophila groups 1-6 bacteria (antigen). Legionella specific IgG, IgM, or IgA antibodies in the specimen will bind to the immobilized antigen. The plate is washed to remove unbound antibody and other serum components.
2. Peroxidase-conjugated goat-antihuman IgG, IgA, and IgM is added to the wells and the plate is incubated. The conjugate will react with antibody immobilized on the solid phase in step 1. The wells are washed to remove unreacted conjugate.
3. The multiwells containing immobilized peroxidase conjugate are incubated with peroxidase substrate solution. Hydrolysis of the substrate by peroxidase produces a color change. After an incubation period, the reaction is stopped, and the color intensity of the solution is measured photometrically. The color intensity of the solution depends upon the antibody concentration in the test specimen.(Package insert: L. pneumophila IgG/IgM/IgA Test System. Zeus Scientific; Revision 12/19/2017)
Forms
If not ordering electronically, complete, print, and send Infectious Disease Serology Test Request (T916) with the specimen.