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Old 07-23-2012, 01:38 PM   #1
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P24 Antigen test - too soon?

Hello,

I took a P24 antigen HIV test (4th generation) 25 days after exposure (3.5 weeks), which turned out to be negative.

Can I safely say that I am probably negative for HIV? they say this test is accurate between 3-4 weeks...

thanks

 
Old 07-23-2012, 01:42 PM   #2
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Re: P24 Antigen test - too soon?

Hi,

Yes it is accurate (very) but not conclusive. You will have to have result confirmed at 12 weeks. It is very unlikely to change.

Here is a statement for BASHH (British Association for Sexual Health and HIV) dated 2010.

"Patients attending for HIV testing who identify a specific risk occurring more that 4 weeks previously, should not be made to wait 3 months (12 weeks) before HIV testing. They should be offered a 4th generation laboratory HIV test and advised that a negative result at 4 weeks post exposure is very reassuring/highly likely to exclude HIV infection. An additional HIV test should be offered to all persons at 3 months (12 weeks) to definitively exclude HIV infection. Patients at lower risk may opt to wait until 3 months to avoid the need for HIV testing twice."

Kevin.

Last edited by blokecalledkev; 07-23-2012 at 02:07 PM.

 
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Old 07-23-2012, 02:06 PM   #3
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Re: P24 Antigen test - too soon?

All tests are conclusive only at 12 weeks and your test is still early and this is your second test already. You run the risk of a false positive by over testing. No amount of tests will change your status and their is no short cut to testing either. For now you need to stop posting on multiple forums and take your mind of this or you will get to hung up about it.
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