[Question #7235] false negative 4th gen test
5 months ago
|
Thank you in advance for your help. Straight male who in
2014 had a high risk exposure. This was virginal sex with woman of African
origin while on holiday in Spain. Complete condom tear only noticed at end.
100% exposure. Earlier that year I also had virginal sex with CSW (I am uk based)
condom used no tear. No other exposures since. However, after that incident in
2014, I stupidly only took an approved 2nd gen home finger prick test and continued with my partner afterwards ( I really
don't know why I didn't go the hospital). Apart from a UTI in 2017, which
cleared up with antibiotics , I have been well. But then in feb this year, I
got a cough, bad chest and cold, which kept me off work for 3 days, and
lingered for about 7-10 days afterwards. However, after this, thick white
coating on tongue, red spots underneath, some pain. After research realized
oral thrush, which is late stage HIV infection. It persists to this day. I have
only seen Dr virtually and he prescribed x2 daktarin gel and then x1 nystatin,
but have not been back since. Since then my health has been downward spiral. I
have pain in my lower back and sides (kidney), which I had urine dip stick test
which didn't show anything, sore throat on and off for months, feeling dizzy, and some skin
infections, and lots of spots with puss. I am not sleeping for the last 6
months. As the Sexual health clinics were closed due to covid, I did another
two 2nd gen self test, which were both negative, but have no faith in, and
eventually saw HIV Dr in June at hospital and got 4th gen lab test for hiv, and
test for hep b, hep c, and syphillis. All came back negative. I told him of
exposure and oral thrush, but he said to see my local Dr about it. I was surprised
because oral thrush red flag As there is no walk in service it is appointment
only, and they won’t see me again as test was negative and no further risks.
However I doubt the results due to number of reasons: I could have been exposed
to HIV2 which is prevalent in Africa and much harder to detect. I think I am
late stage HIV with oral candidiasis and
I have suffered seroreversion (my antibodies no longer detectable). I am one of
those rare cases of seronegative patients (I do not produce antibodies) . About
35 documented cases of seronegative cases in 2019 medical journal.
I am worried as my partner has been feeling fatigued for
weeks now, has persistent cough and has foot fungal problems. I know I have
passed it onto her and do not want her to get ill, so I need to know what is
best test to take next? Another 4th gen to rule out lab error? I
have booked an hiv-1 rna pcr test, which expect to be returned ‘positive’ but
if hiv-1 virus is not detected what test can I take rule out hiv2? Please, I am
losing my mind and need to be on ART as soon as possible.
![]() |
H. Hunter Handsfield, MD
5 months ago
|
5 months ago
|
Hi Doctor,
Thank you for your quick response. I want to say I totally respect
the answer received from such an esteemed expert, and do not wish to question
it, especially as a non-medical\scientific professional, but I still have
doubts.
Firstly, in terms of the reports, I probably need to
clarify. It was not about faulty 4th gen tests, rather reports on 35
persistently negative or intermediate results in HIV seronegative (or
seroreversion) individuals. I think they all refer to antibody only tests and WB,
and span a timeframe from 1994-2017, which I admit is a very small number for
the number of years and tests. I think most (if not all) had late stage
HIV\AIDS. Here is the link:
https://ideas.repec.org/a/abf/journl/v20y2019i2p14877-14882.html
and the PDF:
https://biomedres.us/pdfs/BJSTR.MS.ID.003423.pdf
Also, this article from HIV Dr in Singapore regarding false
ELISA tests, although he acknowledges they are 1 in a million cases:
http://www.drtanandpartners.com/false-negative-hiv-elisa-test/
In terms of my prognosis, I must admit that Oral Thrush was
the main driver, as lots of the literature points to being most common late
stage HIV infection, and very common in HIV positive individuals. All the HIV
websites I looked at seemed to suggest people were tested and diagnosed through
oral thrush, and that unless you have taken antibiotics (which I hadn’t) or
smoked a 100 cigarettes a day, then you had to be severely immunosuppressed to get it! I admit I didn’t sleep for a week after
that, and that convinced me of HIV infection, but I have had other symptoms
over the last few months as well as the ones I mentioned, such as lots of
heartburn\indigestion, trouble swallowing, which may, in fact, be systematic
candida? Plus dental issues. Together with my partner’s symptoms, it is a troubling,
but somewhat compelling case.
I guess I am worried that a) one 4th gen test isn’t
enough. I always worry I could be that 'outlier', that 1 in 1000 that is not picked up. Although the two finger prick home self-test kits also check for hiv1\2
ab, and claim 99.7% specificity, I am
not convinced by them, and I am worried that condom split with woman of
African origin in 2014, from continent with high very HIV rates, and high HIV2
rates, that I was exposed to HIV2, and the tests in Europe may not be sensitive
to this? As well as the other reasons I have outlined (especially
sero-reversion late stage HIV).
I guess after 6 months I am past the stage of ‘Am I infected?’
to ‘how do I get it detected?’.I just don’t want me (or my partner) to end up
in A&E really ill and on death beds before I\we get diagnosed. In terms of the RNA, I have paid to take this
with private Doctor. To be fair, after the online consultation, he didn’t
recommend the test, based on what I said, even though he said it would cost him
money. He was just as confident in the 4th Gen test at public
Hospital.
I should get the results within 3\4 days of taking the test.
I am not holding out much hope. However, if it is negative, as it is checking
only HIV1 it probably still won’t be the end of my worries! Thank you for your
time and expertise.
![]() |
H. Hunter Handsfield, MD
5 months ago
|
---
---
---
5 months ago
|
![]() |
H. Hunter Handsfield, MD
5 months ago
|
---
---