Are immunochromatography test results after 28 days of exposure conclusive?

Q. Are immunochromatography test results after 28 days of exposure conclusive?

Answered by
Dr. Sushil Kakkar
and medically reviewed by iCliniq medical review team.
This is a premium question & answer published on Jan 17, 2018 and last reviewed on: Jul 11, 2023

Hello doctor,

I have had HIV (Human Immunodeficiency Virus) 1 and 2 antibody test to detect antigens p24, Glycoprotein (Gp41, and Gp120) of HIV immunochromatography after 28 days of unprotected vaginal sex, and the results are nonreactive. Does it mean I am safe from the virus? I am now two months past, and I have no symptoms.

#

Hello, Welcome to icliniq.com.

This HIV (human immunodeficiency virus) screening test involves antibodies and antigens accurately. It detects the majority of those infected at four weeks, whereas its sensitivity increases between 99 and 99.9 % at six weeks. So most HIV specialists consider the results of this test conclusive at six weeks.

Hi doctor,

Thank you for the reply.

So, the test I have is accurate or not?

#

Hi,

Welcome back to icliniq.com.

I understand your concern.

It is accurate, but at four weeks, it would accurately detect 95 out of 100 HIV patients blood tested (95 % sensitivity) and miss out 5 HIV patients (false negative result ). However, at six weeks, it would accurately detect almost all HIV patients tested (99.9 % sensitivity). So I suggest you repeat this test for a conclusive result. Since it has been two months, you have had a risk exposure.


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