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Epstein-Barr Viral Capsid Antigen (VCA) Antibody (IgA)
Test Code38015
CPT Codes
86665
Preferred Specimen
1 mL serum
Minimum Volume
0.25 mL
Transport Temperature
Refrigerated (cold packs)
Specimen Stability
Room temperature: 7 days
Refrigerated: 14 days
Frozen: 30 days
Refrigerated: 14 days
Frozen: 30 days
Methodology
Indirect Immunofluorescence Assay
FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by FDA. This assay has been validated pursuant to the CLIA regulations and is used for clincial purposes.
Setup Schedule
Sets up 5 days a week.
Report Available
Reports in 1 to 3 days.
Clinical Significance
VCA IgA titers ≥1:80 often indicate chronic or reactivated EBV infection, whereas titers of 1:10, 1:20, or 1:40 usually indicate past infection.
Elevated titers of VCA IgA are found in most patients with nasopharyngeal carcinoma; titers decrease with successful treatment.
Elevated titers of VCA IgA are found in most patients with nasopharyngeal carcinoma; titers decrease with successful treatment.