Thank you for taking the time to read this. I always find your replies to questions informative. I had a Duo test done 4 weeks from an encounter I was worried about. Everything was negative. I should have felt relieved but I couldn't stop thinking if the lancet was reused. About a week ago I got some swelling in my neck. I am panicked I got HIV from the test. I have taken two Oraquick tests at 2-3 weeks past when i was tested. I saw on your site this should be 90% accurate. Is that correct? Any help you can give is appreciated.
Hello and thanks for contacting AIDS Vancouver with your question. It sounds like you are concerned about the reliability of your test results.
It sounds like you had the 4th Generation EIA. It is a blood test that looks for antibodies AND p24 protein antigens and is commonly referred to as the "combination," "combo" or "DUO" test. P24 protein is detectable immediately after infection but only for the first few weeks. The antibody (ab) test has a window period of 4-12 weeks post exposure. You say you took the test at 4 weeks, this is within the correct window period for this test. Most HIV specialists consider this test to be conclusive at 6 weeks but official HIV testing guidelines still recommend re-testing at 12 weeks(3 months) for conclusive results. . Accuracy is 99.9%
You say you have also take 2 Oral swab tests after your duo test. Up to 95% of infections are detectable within 4-6 weeks post exposure. Most people develop detectable antibodies in 21-25 days. Oral swab test is most common in the U.S. but due to false positives in Canada it is not approved. In it's Summary of Safety and Effectiveness, July 2012 of OraQuick tests, the FDA(U.S. Food and Drug Administration) states that there was an, " observed sensitivity of 91.7% ".
Keep in mind that all HIV tests are considered conclusive at 3 months post exposure. Even if after reading this information you feel that another test would give you peace of mind, I would recommend that you retest 3 moths post exposure. At that time, your test will be considered conclusive.
I would also encourage you to check out the following resources for more information about HIV:
Thanks for contacting AIDS Vancouver.
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