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Dr. Natasha
Dr. Natasha, Doctor
Category: Health
Satisfied Customers: 11788
Experience:  American Board Certified in Emergency Medicine and Ivy League trained
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is a second generation hiv antibody test reliable at 25 days

Customer Question

is a second generation hiv antibody test reliable at 25 days post-exposure?
Submitted: 11 months ago.
Category: Health
Expert:  Dr. Brims replied 11 months ago.

Dr. Brims :

Hello, welcome to the site! My name isXXXXX will try to assist you with your medical question and any medical information you seek.

Customer:

sorry, i'm back

Dr. Brims :

Yes, it is reliable

Customer:

but everyone online says that second generation tests aren't reliable until 42-60 days

Dr. Brims :

That is not true, they are not 100% reliable until later but that doesn't mean they are not reliable at 25 days

Customer:

so how reliable are they at 25 days, i'm talking 2nd generation tests, not 3rd or 4th, do you have any data or studies on when 2nd generation tests are reliable like 10 days: 20% 20days: 50%, any data like that?

Dr. Brims :

An HIV test is usually conclusive at 12 weeks or 84 days (3 months), post last risk exposure

Dr. Brims :

The test you had was an antibody test, correct?

Customer:

yes, a second generation antibody test

Dr. Brims :

Okay, do you have anxiety disorder?

Customer:

no i don't

Dr. Brims :

Okay, the antibodies may take time to develop, so if you are still concerned, you may re-test in 30 days, and again in 60 days

Customer:

yeah i already know that, that's not the question i'm asking, i'm asking how reliable is the 2nd generation test at 25 days, do you have an answer for that?

Dr. Brims :

It is 95% reliable at 4 weeks, which is 28 days, I do not have specific data for 25 days

Customer:

where did you find 95% at 4 weeks? can you link that to me?

Customer:

it doesn't say anything about 28 days or that it was a second generation test

Dr. Brims :

ELISA is a second generation test

Customer:

where is the 28 days that you were talking about?

Dr. Brims :

Give me a few minutes

Customer:

ok

Customer:

thanks, XXXXX XXXXX you working hard on this one

Expert:  Dr. Natasha replied 11 months ago.
Hi this information is very incorrect An Elisa test is not second generation specifically and this is incorrect information. Please see this linkhttp://hivinsite.ucsf.edu/insite?page=basics-01-01
Customer: replied 11 months ago.

what about second generation test, i'm 25 days post exposure and the test was negative, how reliable is this?

Expert:  Dr. Natasha replied 11 months ago.
It is not reliable. If you want a reliable test, get the duo at 28 days which is the 4th gen test, the DNA or RNA pcr test- which is reliable now at 26 days or you can do the 2nd gen test at 3 mos then 6 mos.

Good luck
Please leave positive feedback if this helped.
Customer: replied 11 months ago.

today i actually submitted blood for the duo 4th gen, so i submitted it 25 days post exposure, if this is negative (i know it hasn't been 28 days), how reliable is that?

Expert:  Dr. Natasha replied 11 months ago.
99.4%

Please leave positive feedback if this helped
Dr. Natasha, Doctor
Category: Health
Satisfied Customers: 11788
Experience: American Board Certified in Emergency Medicine and Ivy League trained
Dr. Natasha and 6 other Health Specialists are ready to help you
Customer: replied 11 months ago.

what do you think my chances of having contracted it are, i had protected vaginal and anal with a woman and unprotected oral 3 times over the course of the night, i'm so stressed out about this, please offer some guidance, thank you

Expert:  Dr. Natasha replied 11 months ago.
This is a separate question with stats I am happy to share, but it is not connected to the one you posted. Site rules
Expert:  Dr. Natasha replied 11 months ago.
Did you give oral sex or receive?

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