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HIV Antibody and Antigen Combination Test
|In House Availability||Monday - Friday (day shift only)|
|Collection Instructions||For tests not ordered directly via APEX, the ordering provider should document patient consent in the medical record|
|Container type||Red top|
|Amount to Collect||1 mL blood|
|Preferred volume||0.5 mL serum|
|UCSF Rejection Criteria||Grossly hemolyzed samples|
|Processing notes||Refrigerate samples.|
|Synonyms||Human Immunodeficiency virus:HIV-1, HIV-2 Antibody & HIV-1 p24 Antigen|
|Stability||Room temperature 3 days|
|Reflex?||HIV-1/2 Antibody Differentiation will automatically be performed on all positive samples at an additional charge. Indeterminate or negative results on the secondary assay will be reflex to HIV-1 NAT testing (send out test).|
|Additional information||This test detects antibodies to HIV-1 and HIV-2 along with the p24 antigen. Reactive results will be tested secondarily with an immunoassay to differentiate HIV-1 antibodies from HIV-2 antibodies. Indeterminate or negative results on the secondary assay will be reflex tested for HIV nucleic acid (HIV-1 NAT, sendout test). Positive screening with negative or equivocal secondary testing could indicate acute HIV infection or a false positive result. This testing methodology follows the CDC recommendations published in June 2014 (for further information, see http://www.cdc.gov/hiv/guidelines/testing.html).
Note</'b>: Per the CDC recommendations, HIV-1 Western blot testing is generally not indicated with the availability of the HIV-1 NAT test. HIV-1 NAT can be ordered separately in cases where a false positive screening result is suspected.
|Last Updated||12/14/2014 3:30:51 PM|