Test Details
Methodology
Enzyme-linked immunosorbent assay (ELISA)
Result Turnaround Time
1 - 5 days
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
Use
This assay can be used to identify exposure to Legionella pneumophila but serological testing is not recommended for diagnosis of Legionella infection. This assay does not differentiate between previous exposure/infection and current infection. Per current recommendations, culture of lower respiratory secretions and/or the Legionella urinary antigen test should be used for diagnosis of infection with Legionella.
Special Instructions
This assay differentiates between previous exposure/infection and current infection. Serological testing is not recommended for diagnosis. Per current recommendations, culture of lower respiratory secretions and/or the Legionella urinary test should be used for diagnosis of infection with Legionella.
Limitations
This assay detects antibodies against L. pneumophila serogroups 1 through 6. It does not detect non-pneumophila, or atypical, Legionella species. This assay cannot differentiate between previous exposure/infection and current infection. A diagnosis should be made on the basis of Legionella serology results alone; test results should be interpreted in conjunction with clinical evaluation and other diagnostic procedures.
Specimen Requirements
Specimen
Serum
Volume
0.4 mL
Minimum Volume
0.2 mL
Container
Red-top tube or gel-barrier tube
Stability Requirements
Temperature | Period |
|---|---|
Room temperature | 7 days |
Refrigerated | 7 days |
Frozen | 7 days |
Freeze/thaw cycles | Stable x3 |
Reference Range
Non-reactive
Storage Instructions
Room temperature
Causes for Rejection
Hemolysis; lipemia; gross bacterial contamination
LOINC® Map
| Order Code | Order Code Name | Order Loinc | Result Code | Result Code Name | UofM | Result LOINC |
|---|---|---|---|---|---|---|
| 164616 | Legionella pneumophila Abs. | 7947-5 | 164618 | Legionella pneumophila Abs. | 7947-5 | |
| Order Code | 164616 | |||||
| Order Code Name | Legionella pneumophila Abs. | |||||
| Order Loinc | 7947-5 | |||||
| Result Code | 164618 | |||||
| Result Code Name | Legionella pneumophila Abs. | |||||
| UofM | ||||||
| Result LOINC | 7947-5 |