Nucleic acid test

What is Nucleic acid test?

A nucleic acid test, often called a "NAT", (or nucleic acid amplification test - "NAAT") is a molecular technique used to detect a virus or a bacterium. These tests were developed to shorten the window period, a time between when a patient has been infected and when they show up as positive by antibody tests. The term includes any test that directly detects the genetic material of the infecting organism or virus.

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Questions and answers on "Nucleic acid test"

I had unprotected sex with a married female 23 yrs (this was my first sex with her ) and we both had gone for hiv test after 1 week the result was negative and after 1 month we both tested again still its negative still i am getting fear that is there any posibility of getting hiv and do i need to wait for 6 months and take a test again ?
Hai, Usually HIV antibody tests available anywhere will take 8-12 weeks to become positive, sometimes may be delayed upto 3 months. This period is called as window period. So have another check up after 3 months after your contact. If it is negative even after 3 months you need not to worry. If...
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I was recently diagnosed as having Chlamydia. My concern is that my son confused my Sonicare toothbrush for his and used it. I'm afraid that it could have been passed onto him because I know that the bacteria can live in the throat. Should I have him tested?
thanks for your query,
i have gone through your question, nothing to worry about your son getting infected just by using your toothbrush.. if you are still in doubt and wants to get it confirmed consult a physician and go for Nucleic acid amplification tests (NAAT), such as polymerase chain...
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which test clear hiv and how many days requr for this test from infection, i m enfected hiv since 2 may and i have test hiv dna pcr on 9 may with notdetected.
Welcome to Healthcare Magic
Good Day
The HIV PCR is one of the most sensitive tests to detect HIV virus. It is usually done after 3 weeks of the suspected exposure. You have not specified clearly as to what tests you had done before which were positive. Please elaborate.
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I had a duo HIV test at 28 days after sleeping with a sex worker and then another duo test at 11 weeks, both test where negative is there any chance I could still be positive
Hello and thank you for your query.

If the duo test included a XXXXXXX test or nucleic acid test then you can be certain that you are negative for the HIV virus. 11 weeks is plenty of time to allow for an accurate analysis of your blood for the HIV virus. If your test was an antibody test then...
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i had protected sex with one lady. after ejaculation i removed my condome. later on i have washed my penis with water. 1. whether during washing, is there any chances of getting vaginal fluids into urethra as some of vluids touched my body where condome was not covered(edges) 2. she touches my body with her hand. my doubt is that her hand may contain vaginal fluids. on my body sweat bumps(due to heavy sweat) are there. is there chances of getting hiv into body 3. if i want to make PCR RNA test whether 5 to 6 days is sufficient to get accurate result. 4. have to come across incidentds that during protected sex also, hiv was transmitted. 5. exactly how much time hiv will survive in outside environment
Brief Answer:
Chance of infection is very small but can get test

Detailed Answer:
welcome to HCM!
Healthy skin is an excellent barrier against HIV . HIV cannot enter the body through unbroken skin.Yes,HIV transmission can occur when vaginal fluid containing HIV from an infected person enter...
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Hello doctor

I have exposed to unprotected sex on 3rd April 14 whose HIV status is unknown.I want to get tested for the same.Can u please suggest any test which can be done immediately.

I know there is a window period ,but like to get tested immediately.Can u also recommend any hospital for Anonymous tests and also prescribe for the test.

Brief Answer:
HIV-PCR and p-24 Antigen tests can be done.

Detailed Answer:
Hello and welcome to Healthcare Magic. Thanks for your query.

You have mentioned that you have had unprotected sex about 15 days ago. Now, the usually done HIV test (i.e. HIV-ELISA) has a window period of upto 2 - 3...
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How accurate is a HIV RNA early detection test at 8 days post exposure?

I know the HIV RNA test is 95-99% at 9-11 days post exposure. I am heading out of town and wanted to get one on the 8th day. Would this just decrease its accuracy slightly? I'm just looking for some comfort before I can take a DUO test at 3 weeks. Thank you.

Thanks for your query to XXXXXXX

Until now research on HIV RNA testing (test which is used to detect recent HIV infection) states that the test is able to detect the virus only after a minimum of 9 days of exposure. Hence it would be apt if you wait and get it tested on day 9.

Though HIV RNA...
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is PCR THE MOST effective test for i have to repeat it
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is hiv test p24 antigen and antibody 28 days negative p24 antigen and antibody 42 days negative pcr dna detecter test 56 days not detected p24 and antibody test 70 days negative after epposure conclusive enough i am still having few symptoms. i Am having reddish penis and terrible itch, sore throat , mental fogging confusion. What test i should do.
Hi Amitnaunirishikesh
Welcome to Health care Magic

For ur Query My ans Include two parts.

Part I = Laboratory investigation Query
Part II = Clinical Symptoms Query

Part I ::

Ans :: As per recent nucleic acid testing (NAT) diagnosis can be done on 16th day with p24 antigen...
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