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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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Suggest Opinion About The Window Period Of HIV

hello doctor .i had a sexual encounter in bankok chang mai.it was not a penetrative sex..the sex worker just rubbed her vagina on my penis without condon and while rubbing i ejacuated..99.9 was my penis outside the tip might had penetrated..i am not sure..then after 9 dya i took a dna pcr from reliance life sciences ..then after 50 days again i took a dna pcr test from relaice life sciences..then a elisa test after 90 days ..al these test cam back negative..is this conclusive..i read on the net that some test 6 months window period. Plz reply
Thu, 5 Jun 2014
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General & Family Physician,  's  Response
Hello!
I read carefully your query and understand your concern.
Elisa is an antibody test that measure the antibodies against HIV.It take some time for the immune system to produce enough antibodies for the antibody test to detect.This time is called window period and can last up to 3-6 months for this test.
PCR test (Polymerase chain reaction test) is done to test the actual virus.
Rather than look for an immune response, they look directly for HIV, usually in a blood sample.It is done 2-3 weeks after infection.

Since you have done the both tests and the result after 90 days is negative for HIV infection,it is conclusive.You don't need to do further tests,YOU ARE HIV NEGATIVE.

Hope my answer has helped.
Take care
Dr.Rovena
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Suggest Opinion About The Window Period Of HIV

Hello! I read carefully your query and understand your concern. Elisa is an antibody test that measure the antibodies against HIV.It take some time for the immune system to produce enough antibodies for the antibody test to detect.This time is called window period and can last up to 3-6 months for this test. PCR test (Polymerase chain reaction test) is done to test the actual virus. Rather than look for an immune response, they look directly for HIV, usually in a blood sample.It is done 2-3 weeks after infection. Since you have done the both tests and the result after 90 days is negative for HIV infection,it is conclusive.You don t need to do further tests,YOU ARE HIV NEGATIVE. Hope my answer has helped. Take care Dr.Rovena