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Answer
HIV Duo Testing (ELISA IV), which detects the HIV-1-P24 antigen -- a definitive precursor of HIV -- has a superb success rate at as little as 7 days. However, a 28-day test is recommended, and apparently produces a higher degree of accuracy. Answer
HIV Duo detects both antibodies to HIV as well as p24, which is part of the virus itself. Antibodies are only formed after exposure to the antigen, so the antigen is detectable earlier than antibodies. This test reduces the window period significantly, and as the previous answer said, has a good sensitivity at even 7 days.
However, we must remember that each individual is different, and may "incubate" the virus for a different time to other people. In any particular individual, 4th generation ELISAs such as the Duo will only pick up antigen 7-10 days before the antibody appears. So those who would become positive on an antibody-only assay at 8 weeks will become positive on the Duo at 6.5-7 weeks. HIV first has to replicate locally before it spreads to the lymph nodes, and only after that does the major viraemia appear, and it is that viraemia that is detected by the p24 part of the assay. If the local replication occurs quickly, the person will be positive sooner.
There will always be the very small percentage who take longer.
There is one pont which is not logical.
So those who would become positive on an antibody-only assay at 8 weeks will become positive on the Duo at 6.5-7 weeks.
The antibody production is the host response to the antigen there may be differences in the time period of host response so it would be wrong to conclude the presence of antigen relative to antibody production.assume A and B are infected (read antigen present at point t(time)) A takes x period to seroconvert(antibody production) and B takes Y period to seroconvert.but both had antigen at t(time) hence it would be wrong to assume presence of antigen in A as x-c and B as Y-c (c is a constant). both would be different.
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What else can I help you with?
Can you have and accurate sti test after only 8 days?
In general, most STI tests are not considered accurate until at least a week or two after potential exposure, depending on the specific infection. For example, tests for HIV can be reliable around 10 days post-exposure, while others like gonorrhea and chlamydia may take longer for accurate results. It’s best to consult with a healthcare provider for guidance on the appropriate timing for testing based on the specific STIs and individual circumstances.
What is the window period for Western Blot test?
The window period for a Western Blot test is typically around 3 to 8 weeks after initial exposure to a virus, such as HIV. During this time, the body may not have produced enough antibodies for the test to detect. It is important to wait until after this window period for accurate results.
How a person knows he or she got HIV?
Have an HIV antibody test anytime 8 weeks or after, post your last exposure to know your status. That is my friend the ONLY way to know
When is the earliest time you can take an EPT?
Some tests say you can use them 2 or 3 days before your period is due, but if you take it when your period does not come it will be more accurate. You can take a pregnancy test as soon as you are late for your period. The longer you wait to do the test, the higher the accuracy of the test.
Possible implantation bleeding 7 days ago for 2 days Preg test was neg today would that be accurate or does it take longer for hcg levels to show?
HCG levels begin building around 8 days past ovulation. For accurate results, it is best to wait until the day after you have missed your period.
Hi Peter, I understa?
Hi Peter, I understand that you are very frightened. I would be happy to answer your question. Whether or not the negative result is reliable or not depends on what the test was. There are two ways to test for HIV: antibody and RNA levels. The most common and widespread way of testing for HIV involves testing the blood for levels of antibodies against HIV. If a person is exposed to HIV, his or her body will develop antibodies against the virus to try to fight it off, and these can be detected in the blood. Antibodies can take a relatively long time to be detected (2-8 weeks or even longer in some individuals). RNA testing measures HIV directly (the virus itself instead of the antibodies against it), and this can return positive much more quickly than antibody testing-typically, 9-11 days after HIV exposure. So, if you were exposed to HIV 11 days ago, you would most likely not demonstrate any antibodies until 2 weeks after the event at the earliest, but the virus would most likely be detectable by now. Since your doctors told you to "not worry", I suspect they checked your HIV RNA, not antibodies to HIV. For your peace of mind, you can ask your doctor the type of test that was done-if it was the antibody test, you will need to wait several months and be tested again. But if it directly tested for HIV and was negative at 11 days, odds are you are in the clear.
Can you pass a cocaine test 8 days after use?
yes
How old is Mrs.Whatsit?
2,379,152,497, 8 months, and 3 days exactly in OUR calendar, which isn't REALLY accurate!2,379,152,497 + 8 months + and 3 days
I have 8 days until my preiod how soon can you find out if im pregnant?
It will depend upon the pregnancy test. Some tests can predict up to five days before your expected period, while other's can only predict up to one day before your expected period. But you have to keep in mind that the sooner you take the pregnancy test, the less accurate your results will be. It is best to take the test 14 days after intercourse.
Blood test fasting?
A fasting blood test is done after 8-12 hours of fasting (no food or drink other than water). This is done to get accurate readings of glucose, cholesterol, and triglyceride levels. It is important to follow your healthcare provider's instructions for fasting before a blood test to ensure accurate results.
Can pregnancy test be positive 4 days after Conceiving?
10 to 14 days. However, it isn't conception that matters. It's implantation.
How many weeks before you can use pregnancy test?
8-10 days after ovulation
