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Division of Consolidated Laboratory Services


Laboratory: Immunology/Virology

Test Description: The GS HIV Combo Ag/Ab EIA is an enzyme immunoassay based on the principle of the sandwich technique for the qualitative detection of HIV-1 p24 antigen and detection of envelope antibodies associated with HIV-1 and/or HIV-2 virus in human serum or plasma.

Order Approval Required? No

Specimen Type: Coagulated Blood

Collection Container: Red Top

Optimal Volume: 5 ml

Collection Guidelines: Specimens can be collected in serum tubes. Do not heat-inactive samples. Extensive hemolysis will affect test performance.

Storage Container: Samples are stored in original tubes for 7 days or are aliquotted into a cryovial and are frozen in -20°C or colder freezer.

Storage Instructions: Samples should be stored at 2-8 °C for 7 days after collection. Serum may be aliquotted and stored at 2-8 °C for shipping or frozen at -20°C or colder.

Transportation Instructions: Ship on cold packs

Test Methodology: Enzyme Immunoassay (EIA)

Additional Information:

Causes For Rejection:

  • Grossly Hemolyzed
  • Quantity not sufficient for testing
  • Improperly labeled
  • Tube broken in transit
  • Sample older than 7 days
  • OCME specimens not validated by kit
  • >2 years of age not validated by kit

Possible Results: Non-reactive, Reactive, invalid, HIV-1 Positive, HIV-2 Positive, Inconclusive, HIV undifferentiated