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HelpTest ID FFAG4 Filaria Antibody (IgG4)
Specimen Required
Specimen Type: Serum
Container/Tube: Red or SST
Submission Container/Tube: Plastic vial
Specimen Volume: 0.5 mL
Collection Instructions:
1. Draw blood in a plain red-top tube(s), serum gel tube(s) is acceptable.
2. Centrifuge and send 0.5 mL serum refrigerated in a plastic vial.
Method Name
Immunoassay
Reporting Name
Filaria Antibody (IgG4)Specimen Type
SerumSpecimen Minimum Volume
0.5 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum | Refrigerated (preferred) | 14 days | |
| Frozen | 30 days | ||
| Ambient | 7 days |
Reference Values
Reference Range: <2.50 index
Interpretive Criteria:
<2.50Â Â Â Â Â Â Â Â Negative
≥2.50Â Â Â Â Â Â Â Â Positive
 This assay detects Filaria IgG4 associated with infections caused by the major filarial parasites, including Dirofilaria immitis, Wuchereria brancrofti, Brugia malayi, and Onchocerca volvulus.
Chronic filarial infections manifesting as elephantiasis may not show a significant IgG4 response and cannot be ruled out using this test. Samples containing antibodies to other nematodes,
particularly Strongyloides, may cross-react in the assay.
Day(s) Performed
Wednesday
Report Available
6 to 20 daysPerforming Laboratory
Quest DiagnosticsTest Classification
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by the U.S. Food and Drug Administration. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.CPT Code Information
86682
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| FFAG4 | Filaria Antibody (IgG4) | 14208-3 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| FFAG4 | Filaria Antibody (IgG4) | 14208-3 |