what is this test?
Jul 28, 2002
When I initially tested positive in the mid 90's a test was performed called an ab antigen absorbance test.I have no idea what this meant and was just curious of it's importance?Also how come the p24 antigen is negative even though you are positive? Thank you
Response from Dr. Holodniy
That test probably refers to HIV proteins (or antigens) in the test which bind with HIV antibodies in a persons blood serum to form a complex, which can then be measured. P24 antigen is produced in huge amounts very early in HIV infection, so has been used for diagnosis and in blood bank screening. It disappears from the serum after antibodies become present. Thus, after people become antibody positive, p24 antigen tests will be negative.
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