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Is HIV Test Conclusive 85 Days Post Exposure?

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Posted on Thu, 7 Jul 2016
Question: Sir,
I did a HIV 1 & 2 and P24 combo (CMIA) test after 84 days of possible HIV infection. I took another test a different lab (HIV 1/2 spot test screening) at 85 days. Both the result came out non-reactive. Should I go for another test at 90 days or my tests are conclusive?
I recently had a TETANUS VACCINE. I found on the internet that TETANUS VACCINE can cause false positive in rare cases. I don't want to give myself tension by getting the false positive. Please walk me through all the tests that are not affected by TETANUS VACCINE in detection of HIV 1 &2. I want to relive myself from this HIV (1&2) tension.
In my home city, labs are offering only HIV 1 RNA QUANTITATIVE, REAL TIME PCR. Will it work? What about HIV 2?
Please help
doctor
Answered by Dr. Sunil Jangid (34 minutes later)
Brief Answer:
You can allay the fear or anxiety related to HIV.

Detailed Answer:
Dear XXXXXXX

Welcome to HCM.

You had HIV 1&2 along with P24 combo after 85 days of possible exposure then you need not to worry at all because the result is highly reliable and accurate near to 100%. The possibility of false with tetanus vaccine is also practically nil after 85 days.

The majority of cases of HIV in XXXXXXX are due to its HIV1 strain. HIV2 is very uncommon in XXXXXXX and prevalent in West XXXXXXX and Sab Saharan Region so don't get worried for that also as HIV RNA PCR is absolutely sufficient for persons living in XXXXXXX

It is just routine guideline to test after 90 days to get 100% conclusive result and to declare any one completely free from HIV nothing else. Be relaxed and go for repeat test, the result will surely come in your favor. If any doubt left get back to me again.

Thank You
Above answer was peer-reviewed by : Dr. Sonia Raina
doctor
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Follow up: Dr. Sunil Jangid (1 hour later)
Sir,
You have misunderstood me. I want to go for HIV test post Tetanus Vaccine. I am worried about the false positive because of Tetanus.

1. What are the tests that are not affected by Tetanus Vaccine?
2. Does Western Blot, HIV 1&2, p24 Combo (CMIA) affected by Tetanus Vaccine and produce false positive?

For your information I had Tetanus Vaccine on 01-06-2016. Please help when can I get reliable test result after this vaccination.

Please help so that I can completely rule out HIV from my life.
doctor
Answered by Dr. Sunil Jangid (8 minutes later)
Brief Answer:
The possibility of false positive is very very rare.

Detailed Answer:
Dear XXXXXXX

Welcome back and thanks for follow-up.

The tetanus vaccine can give false positive result but it is on very rare occasions and after short time of exposure. It is very rare or practically nil to get false positive result after 90 days of exposure even if you had taken tetanus vaccine in this month.

You can go for any of test western blot or HIV 1&2 P24 combo test and the result will be 100% reliable and conclusive to render yourself free from HIV so just calm down and get back to me with test result.

Thank You
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Above answer was peer-reviewed by : Dr. Prasad
doctor
Answered by
Dr.
Dr. Sunil Jangid

HIV AIDS Specialist

Practicing since :2009

Answered : 2017 Questions

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Is HIV Test Conclusive 85 Days Post Exposure?

Brief Answer: You can allay the fear or anxiety related to HIV. Detailed Answer: Dear XXXXXXX Welcome to HCM. You had HIV 1&2 along with P24 combo after 85 days of possible exposure then you need not to worry at all because the result is highly reliable and accurate near to 100%. The possibility of false with tetanus vaccine is also practically nil after 85 days. The majority of cases of HIV in XXXXXXX are due to its HIV1 strain. HIV2 is very uncommon in XXXXXXX and prevalent in West XXXXXXX and Sab Saharan Region so don't get worried for that also as HIV RNA PCR is absolutely sufficient for persons living in XXXXXXX It is just routine guideline to test after 90 days to get 100% conclusive result and to declare any one completely free from HIV nothing else. Be relaxed and go for repeat test, the result will surely come in your favor. If any doubt left get back to me again. Thank You