Aa
A
A
A
Close
HIV Prevention Community
53.5k Members
Avatar universal

INSTI HIV-1/HIV-2 Antibody Test negative at 29th days.. is it reassuring?

Hi guys,
i have very brief (<5sec) unprotected receptive anal encounter with a man of unknown status (I am male). Basically, he penetrated me without me being aware. Right after I realized I panicked and ran. After few weeks i had some symptoms e.g. temperature ~37.3C - 37.6C for like 10 days. A bit swollen lymph nodes (which might have been a result of constant touching it and double checking). I went for testing - Insti Hiv-1/Hiv-2 Antibody test and it was negative after 29 days after encounter.

I keep reading a lot about ability of Inti test to detect early HIV. One fact which makes me nervous is that even latest Insti test are being considered 2nd generation which would mean that I need to wait at least 42 days to get some reliable results.

On the other hand, I read few scientific studies saying that INSTI HIV-1/HIV-2 Antibody Test is highly sensitive and CAN detect also IgM antibodies which should allow detection of HIV, on average, after 22 days.

Any ideas or thoughts on accuracy of negative INSTI HIV-1/HIV-2 Antibody Test after 29 days?

Thank you so much! Really appreciate your help.  

1 Responses
366749 tn?1544695265
COMMUNITY LEADER
Insti Test is a kind of rapid test that gives results quicker than any other test. However it detects antibodies only and not considered conclusive before 3 months.

Having said that, advise you to stay calm and relaxed. A single isolated incident of brief anal sex with someone of unknown health status does not put you at a very significant risk, there are may odds in your favor.

What we can suggest you, go get yourself tested for a Duo (Antibody+Antigen) HIV test any time now since the test is conclusive after 4 weeks of exposure. Collect your conclusive report and move on with your life normally.
5 Comments
Thank you for the answer Diver58!

I will go for a test in next few days. It will be 6 weeks after exposure. I might ask for a Duo test to get conclusive report.

Coming back to INSTI test - does negative result after 29 days has any value or it is just too early to say (given different time periods when body starts to create antibodies). I have read that appx 90% of people would have detectable amount of antibodies by 4th week if contracted HIV.

Thank you again.  


Yes, it is reassuring to an extent but we cannot call it conclusive. Reliability and high reassurance comes after 6 weeks for a simple antibody test
There is no purpose testing in a few days with the wrong test again. You want conclusive answers, not more probabilities.
Thank you for your answers. AnxiousNoMore - if I go to test in next few days I it will be 6 weeks after exposure. I believe DUO (antibody + antigen) should be already conclusive, is that correct?

One last question -My potential HIV symptoms started appx  10 days before I got tested for antibodies. Do I understand correctly that IF those symptoms  were ARS connected body would already create antibodies and the test would detect them? (I know all of this is on average and each specific case can be different)

Thank you again guys for all the answers and guidance! You are doing an amazing job and help people to overcome anxiety and stress.
Reread divers advice and stop wasting your time studying your body because you will only get more anxious.
Have an Answer?
Top HIV Answerers
366749 tn?1544695265
Karachi, Pakistan
370181 tn?1595629445
Arlington, WA
Learn About Top Answerers
Didn't find the answer you were looking for?
Ask a question
Popular Resources
These tips can help HIV-positive women live a long, healthy life.
Despite the drop in new infections, black women are still at a high risk for HIV, the virus that causes Aids.
What are your HIV treatment options, and how do you choose the right one? Our panel of experts weighs in.
Learn the truth behind 14 common misconceptions about HIV.
Can HIV be transmitted through this sexual activity? Dr. Jose Gonzalez-Garcia answers this commonly-asked question.
A breakthrough study discovers how to reduce risk of HIV transmission by 95 percent.