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HelpTest ID FFAG4 Filaria Antibody (IgG4)
Specimen Required
Collection Container/Tube:
Preferred: Red top
Acceptable: Serum gel
Submission Container/Tube: Plastic vial
Specimen Volume: 0.5 mL Serum
Collection Instructions:
1. Centrifuge and aliquot 0.5 mL serum into a plastic vial.
2. Send refrigerate.
Method Name
Immunoassay
Reporting Name
Filaria Antibody (IgG4)Specimen Type
SerumSpecimen Minimum Volume
See Specimen Required
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Serum | Refrigerated (preferred) | 14 days |
| Frozen | 30 days | |
| Ambient | 7 days |
Reference Values
Reference Range: <2.50 index
Interpretive Criteria:
<2.50: Negative
≥2.50: 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
3 to 18 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 |