Can somebody interpret this for me?

[negeich]

I had an HIV test recently known as HIV DUO Ultra, and I got my results. But I hardly understand what it means. I'd be really grateful if somebody could interpret this for me. Noted down exactly as printed on my result sheet:

Test                                                Result
Index of antibody            =                0.01
Index of P24 Antigen      =                ND (non-determinable)  
Thresholds and Interpretation of results:

Index i :                                           Interpretation:
i0.25                                            Reactive for Antigen (p24) OR antibody

Now, I do understand that if the index is below threshold 0.25 (as in my case), the HIV test is negative (0.01).What confused me a bit is that why the P24 Antigen is Non-determinable. I understand that this is a test for reducing the window period, but my possible encounter with HIV infection has been about 3 years back. After this period, does it mean that the test could not determine the P24 Antigen anymore? The important question is, "Is my result good or not"? meaning the index of antibody (0.01) which falls under the threshold (0.25)?

[negeich]

Thanks Mike...I am a very happy man now...hank you

[mike_no]

1.You were tested on a 4th generation HIV test. Which, checks  for antibodies and antigen simultaneously.

2. A six week negative on a 4th gen test can be taken as conclusive. On contraction of HIV, the body seroconverts any where between 7 to 24 days during which, the p24 antigen level in the person's body is high and would be detected even if the antibodies are not detected. However, by the time it's 42 days the antibody reaches the detectable level and correspondingly the p24 ag level decreases.

3. Now, your test result means that no antigen or antibodies were detected. Don't frenzy on the test numbers those are mere testing technicality. As long as they are below 1, you are negative.

[negeich]

Thank you Thank you

[Teak]

Yes..

[negeich]

Thanks Peak. So, does that mean that the "Index of P24 Antigen which is ND (non-determinable)"  in my result have no significant indication here? Because I'm way past the window period (3 or more years passed after possible infection). Since the antibody test alone determines that I'm below the threshold, does that mean I am HIV free and can continue with my life without worry?

[Teak]

If you tested 3 months post exposure then you are conclusively negative.

[negeich]

Come on...two lines are not showing at all..let me try this again:

Index i :                                Interpretation:
i- less than 0.25                   Non-reactive for Antigen (p24) AND antibody
i-more than  0.25                   Reactive for Antigen (p24) OR antibody

[negeich]

The above table is not showing properly...Here it is again:

Index i :                             Interpretation:
i0.25                                Reactive for Antigen (p24) OR antibody