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Information on HIV Blood test - Online Doctor Chats

Date : 21-Feb-2012
User rating for this question
Very Good Posted in: HIV and AIDS
Answered by

General & Family Physician
Practicing since : 2005
Answered : 2585 Questions
User :   hello doc
Doctor :   hi
Doctor :   xxxxx
Doctor :   proceed
User :   do you have expertise in HIV related?
Doctor :   i am a general physician i can help u
User :   okay..
User :   I had the following hiv tests.... what would be the accuracy of HIV test at 7 weeks after a concerned exposure
Doctor :   ok
User :   I had the following tests
User :   DNA PCR at 23 days
User :   DNA PCR at 39 days
User :   Antibody test at 39 days
User :   Rapid test at 6 weeks
Doctor :   ok
User :   rapid test at 7 weeks
Doctor :   are they negative??
User :   all of them were negative..
Doctor :   ok
User :   so what is the accuracy of these tests? am I conclusively negative or should I continue to test or no more testing required?
Doctor :   normally ELISA is used as a screening test and western blot to confirm the diagnosis
User :   Sir, my question is different...
Doctor :   yes i am coming to ur popint only
User :   okay
Doctor :   i am just trying to explain for ur knowledge
User :   sure.. thanks
User :   sorry that was my anxiety
Doctor :   its ok
Doctor :   HIV PCR test can usually give accurate results within three weeks of infection.
Doctor :   there is something called as fourth generation test which combines both antigen and pcr test which is even more accurate
Doctor :   antibody test in the initial period will not confirm or exclude hiv
User :   what is that initial period?
Doctor :   but as u have tested for PCR u can relax by 99%
Doctor :   means varies from 6 weekd to 6 months
User :   oh.. thats comfort...
Doctor :   differs from patient to patient
Doctor :   yes
User :   so combined PCR negative and antibody negative at 7 weeks, do i need further testing?
User :   can I have sex with my wife now?
Doctor :   yes
Doctor :   u can
Doctor :   however 100 % confirmation will be done after western blot tes
User :   so you are saying have a wester blot test?
Doctor :   comming to rapid test Rapid HIV testing using oral fluids or blood specimens are EIA/ELISA screening tests that provide results in 20 minutes. T
User :   I had INSTI rapid test
User :   blood test
Doctor :   This kind of test has been shown to be highly accurate (99.5%) and comparable to the blood tests that are performed in a lab. A positive result from a Rapid EIA test is considered "preliminarily positive" and must be confirmed with a Western Blot performed in a lab.
Question is related to
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