Hello, how are you? I write again because of the topic of our last discussion. 12 weeks ago I performed oral sex on a man, where there was no ejaculation. After 3 days I had a fever and throat infection, which I still have to this day.

In these weeks I took 4th generation ECLIA HIV tests on days 28, 43, 52, 64 and 83, and a third generation immunochromatography test on day 77 after that exposure, all negative, but I still have really a really bad sore troath, which is very inflamed and hurts and burns a lot, and does not heal despite treatment and antibiotics. I'm sure whatever infection I have in my throat has something to do with the exposure of that day.

Tomorrow I'm going to take a cualitative PCR test to make sure it's not HIV. Do you think the result will change? Have you seen any results that have changed after week 12? Could ARS symtoms start as soon as 3 days after and last up to 12 weeks? I'm nervous to death. Thank you for your time.

I am confident that your HIV RNA PCR test will not change.  Your results are already conclusive and I have never seen nor heard of a test which changes after 12 weeks.  Further, to begin 3 days after an exposure is too soon to be the ARS and ARS symptoms would not last more than 2 weeks- most typically they last about a week.  

Please don't worry.  I suggest that you see your doctor to find out what is causing your symptoms.  It is not HIV and probably is not an STI.  EWH

I look forward to hearing your test results.  EWH

Well... as you said, the test did not detect the presence of the virus. The sensitivity of the test is 129 cells/ml, that is quite sensitive and it would detect if I had the virus right? I ask this because some people say that over time this test loses sensitivity, which I thought that did not happen, especially with this type of test.

I also saw that this test is only to detect HIV-1, but the other tests I had would have detected the HIV-2, right? I also live in Latin America, and I don't know if there are many cases of that strain in here.

Anyway, thank you very much for the help, it has calmed me down in a moment of great anxiety.

I wish you the best!

Correct, you other tests certainly would have detected HIV-2 if present.  HIV-2 is uncommon in Latin America, as it is in North America.  

As you know, we provide up to 3 responses to each client's questions.  This is my final response.  The thread will be closed shortly without further replies.  Please don't worry.  EWH