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Read Now: Expert Opinions on HIV Cure Research

How Long P24 Antigen Remains Positive

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Ask the Experts

Testing after PEP - Peculiar concerns (HEPATITIS C AND DELAYED HIV SEROCONVERSION, 2011) (APTIMA - HIV-1 RNA QUALITATIVE ASSAY, 2011) (p24 ANTIGEN TESTING, 2011)

Dear Doctor FauscinoWith my apologies if some of the questions below seem repetitive. I hope I do not upset you. There are some matters below that are somewhat distinct and I am hopeful you can add some additional clarity and/or confirmation to....
Robert J. Frascino, M.D.

Response from Robert J. Frascino, M.D.

The Robert James Frascino AIDS Foundation
Hello,No apology is necessary. I've answered so may questions in this forum over the years that greater than 99% of the questions I respond to on a daily basis I've already addressed (many multiple times). Responding to your specific... Read more »

37 weeks positive elisa and p24 indeterminate western blo

I have just been told thst my hiv test(elisa)and my western blot was indeterminate. I am 37 weeks... Read more »

Clarification on P24 Antigen test etc

Dear Mark, I have read with interest all the references to previous questions to your forum on the... Read more »
Articles
U.S. Food and Drug Administration

FDA Approves First Rapid Diagnostic Test to Detect Both HIV-1 Antigen and HIV-1/2 Antibodies

The U.S. Food and Drug Administration today approved the first rapid Human Immunodeficiency Virus (HIV) test for the simultaneous detection of HIV-1 p24 antigen as well as antibodies to both HIV-1 and HIV-2 in human serum, plasma, and venous or... Read more »
Henry J. Kaiser Family Foundation

U.N. Special Envoy for HIV/AIDS in Africa Stephen Lewis to Remain in Post Through 2006

U.N. Secretary-General Kofi Annan's office on Tuesday extended through 2006 Stephen Lewis' position as the United Nations special envoy for HIV/AIDS in Africa, despite his "pointed critiques" of world leaders, donor agencies and the United Nations... Read more »
U.S. Centers for Disease Control and Prevention

More Living With HIV, but Concerns Remain

On Monday at the 2005 National HIV Prevention Conference in Atlanta, CDC presented findings that it said offer the clearest picture of the current extent of the AIDS epidemic in the United States. Thanks to life-prolonging drug therapies, the number... Read more »
Canadian AIDS Treatment Information Exchange

Remaining in HIV Care: Improvements in North America but Much Still Needs to Be Done

Potent combination anti-HIV therapy (commonly called ART or HAART) has greatly reduced deaths from AIDS-related infections in Canada and other high-income countries. The improvements in health brought about by ART are likely to lead to several... Read more »
Connect With Others

P24 antigen

Posted by zdenal, 2 Replies
hi
I want to ask if it is par pripdadu who will not produce antibodies (extremely low risk and still existing) and will go on to test combo, duo, ELISA, etc. 4 generations where the P24 test / antibody. Antibodies are not detectable but P24 is found?... Read more »

Help - P24 Antigen detectability

Posted by Anonymous
7 weeks post exposure, but with a negative antibody test, wouldnt you expect the P24 Antigen test to be positive, especially if you have been symptomatic? Thanks who ever responds to this.

Read more »

4th gen test p24 again

Posted by Anonymous, 3 Replies
seems to me the so called 4th generation test is only good up until 3 weeks after infection. all the research i have done says the p24 antigen test is only good 1-3 weeks after one would have been exposed. so this would mean if i tested at 6 weeks... Read more »

Window/p24 answer

Posted by Anonymous, 1 Reply
For all of you who ae sold on the 3 month window -- read "Use of p24 Antigen Screening for HIV May Be Desirable in Primary Care" AEGIS page. That "12.4" percent is coming from "some date". Whether it's the 6 week or 12 week "window" it show the... Read more »