Anonymous
Good morning , I have many doubts and would like clarification.
What is the maximum period known in the medical literature of late of HIV seroconversion ?
In recent years , with the use of the 4th generation tests have heard reports of seroconversion after 12 weeks ?
How safe window for NAT assays?
Patient takes to produce antibodies and be with high viral load will have tb p24 detectable ?
The only low P24 when anticoportos present?
I am Brazilian and here I vaccine for H1N1 flu, may have abnormal tests for antibodies, what to do in this case? Is there any test that can be done and is not subject to false positive or negative ?
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Anonymous
Hi there and thank you for contacting the AIDS Vancouver Online Helpline.

About 95% of HIV infections are detectable within 4-6 weeks, however, testing is recommended 12 weeks (3 months) after exposure because there are some cases that do not show up on tests until this time. There are also 4 factors that can interfere with test results. They are:

1.) Undergoing treatment for cancer

2.) Taking PEP treatment for HIV

3.) Taking antiviral treatment for hepatitis C

4.) Presence of another immunodeficiency disease (which likely would have been diagnosed at a young age)

If any of these 4 factors it means that HIV may not show up on the most common screening tests and would need to inform a healthcare practitioner of this prior to testing. Vaccines are not known to affect HIV test results. If none of these factors apply a test can be considered to be conclusive when taken 12 weeks (3 months) after exposure.

I hope this information helps to answer your questions.

For more information you can always visit the AIDS Vancouver website or check out CATIE.org.

Isla (Volunteer)

AIDS Vancouver Helpline Online

Monday to Friday 10am to 4pm (PST)

http://www.helpline.aidvancouver.org

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