West Nile Virus Antibodies (IgG, IgM), Serum
Order Name
WEST NILE
Test Number: 3609525
Revision Date 12/12/2022
Test Number: 3609525
Revision Date 12/12/2022
| Test Name | Methodology | LOINC Code |
|---|---|---|
|
West Nile Virus Ab, IgG, Serum
|
Enzyme Immunoassay | 38997-3 |
|
West Nile Virus Ab, IgM, Serum
|
Enzyme Immunoassay | 38166-5 |
| SPECIMEN REQUIREMENTS | ||||
|---|---|---|---|---|
| Specimen | Specimen Volume (min) | Specimen Type | Specimen Container | Transport Environment |
| Preferred | 1 mL (0.5) | Serum | Clot Activator SST | Room Temperature |
| Instructions | Specimen Type: Red-top tube or gel-barrier tube Specimen Storage: Room temperature. Specimen Collection: Not Available Specimen Stability: Ambient: 16 days, Refrigerated : 16 days, Frozen: 16 days |
|||
| GENERAL INFORMATION | |
|---|---|
| Expected TAT | 2-6 Days |
| Clinical Use | West Nile Virus is a flavivirus recently associated with an outbreak of encephalitis in the Eastern United States. West Nile Virus IgM is usually detectable by the time symptoms appear, but IgG may not be detectable until day 4 or day 5 of illness. Antibodies induced by West Nile Virus infection show extensive crossreactivity with other flaviviruses, including Dengue Fever Virus and St. Louis Encephalitis Virus. |
| Notes | Labcorp Test Code: 138842 |
| CPT Code(s) | 86788, 86789 |
| Internal Comments | 10/23/17 change stability from "Specimen is good refrigerated for 48 hours. If testing will be delayed longer than 48 hours, specimen should be centrifuged, serum separated and frozen." to "Allow specimen to clot completely at room temperature. Separate serum or plasma from cells ASAP or within 2 hours of collection. Stability After separation from cells: Ambient 4hours, Refrigerated 7 days, Frozen 1 month (avoid repeated freeze/thaw cycles). " -JK 8/14/18 change schedule from Mon-Fri during season, batched out of season 2-3 days a week to Seasonal. In season: Mon, Wed, Fri. Out of season: Tue, Thur - JK 10/5/20: Updated stability - SN 5/31/21 moved to ARUP had to swap out DTA to move - JK |
| Lab Section | Reference Lab |