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Author Topic: Accuracy of OraQuick rapid test vs Blood rapid test  (Read 5361 times)

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Offline AllenUnsure

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Accuracy of OraQuick rapid test vs Blood rapid test
« on: March 08, 2014, 01:38:43 PM »
Yesterday I performed the OraQuick Home test.  I received a faint positive line after 12 minutes.  I immediately contacted my doctor who said I could come in immediately.  I took the test with me and he confirmed the faint positive line.  I live very close to my Dr so he actually saw the test 45-50 minutes after I started it.

We then performed a rapid blood test in his office.  This test reported Negative.  Within 90 minutes I had conflicting results.   

My doctor is sending blood for a viral count as a confirmation test.  My previous HIV test was early Dec. using OraQuick and was negative.  I regularly test 3 to 4 times a year as I am single, sexually active, gay man.  I have experienced no flu-like symptoms or any other health issues as indicative of sero-conversion.  While I regularly practice safer sex, there have been "lower" risk possibilities of exposure during the last 6 months. 

It's hard to gauge what the real accuracy of OraQuick based on studies I have found so far online.  I realize the information OraQuick includes, while likely a legitimate study, is probably the most "marketing favorable' results available. 

1 Does anyone know of more complete accuracy information on either test approach?
2 Has anyone else received a false positive with OraQuick and what were the circumstances? 

Pretty good with statistics here so information in terms of Specificity, Sensitivity, Standard Deviations, P-value, is all okay.


Offline Ann

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Re: Accuracy of OraQuick rapid test vs Blood rapid test
« Reply #1 on: March 08, 2014, 01:57:57 PM »

Autoimmune conditions (possibly underlying and not-yet diagnosed), and pregnancy can cause false positive results, and sometimes they just happen. It sounds as though yours falls into the latter category because an underlying autoimmune condition would most likely have caused another false positive result at the doctor's office.

Sometimes when you wait too long to look at the rapid tests, they will have developed a faint line in the positive section, and I suspect that's what's happened here, given that the rapid test at your doctor's office was negative.

Provided you are not in a window period (meaning it's been at least three months - THREE, NOT SIX - since your last incident of unprotected anal or vaginal intercourse), then you do not need further testing following the negative result in your doctor's office.

PCR (viral load) testing is NOT to be used as a diagnostic or confirmatory test, so your doctor was remiss in ordering this test. The test that is used to confirm a positive antibody test is called a Western Blot test.

In all honesty, unless you've had unprotected anal or vaginal intercourse since your last negative result in December that you haven't mentioned, I'd take that negative result at your doctors office as conclusive and reliable. A "faint" positive result on a home test isn't worth the plastic it's turned up on.

« Last Edit: March 08, 2014, 02:00:03 PM by Ann »
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Offline RapidRod

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Re: Accuracy of OraQuick rapid test vs Blood rapid test
« Reply #2 on: March 08, 2014, 02:11:40 PM »
Oraquick test has to be read at the correct time line. 20 minutes after the test and no later than 40 minutes. Any other time and the test will not be accurate.


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