Q. What is the cut-off value for ELISA test?
Answered by Dr. Arun R Kaushik and medically reviewed by iCliniq medical review team.
Hello doctor,
I have some queries about HIV, ELISA/ECLIA TEST. What is the cut-off for this test? In some lab reports, they do not mention the cut off rate. They just mention if it is reactive or non-reactive. In some labs, 0.9 is the cut off while in others, it is different. Why is it so?
Related Questions:
• Will the UA be negative when heroin-positive menses blood is mixed with clear urine?
• While on PEP, is HIV RNA PCR test conclusive?
• Is negative RNA PCR test on day 12 a conclusive one?
Dr. Arun R Kaushik
MBBS., MD., FICM
Critical Care Physician, Geriatrics, Microbiology
Hello,
Welcome to icliniq.com.
- The cut-off depends on the kit and the instrument used.
For more information consult a microbiologist online --> https://www.icliniq.com/ask-a-doctor-online/microbiologist
Thank you doctor,
If the result is 0.56 and the cut off is 0.9, does that mean the result is non-reactive? How should I interpret this result? If the result is 0.8, does it mean that the person is near the cut-off value hence at a higher risk? Or is any value below 0.9 considered out of risk?
Dr. Arun R Kaushik
MBBS., MD., FICM
Critical Care Physician, Geriatrics, Microbiology
Hello,
Welcome back to icliniq.com.
- These tests are screening tests, and it is difficult to determine their accuracy.
- If you have some concerns, you may need to do a molecular test like PCR to confirm the results.
For more information consult a microbiologist online --> https://www.icliniq.com/ask-a-doctor-online/microbiologist
Related Questions & Answers
Query: Hello doctor, Is HIV RNA, QL TMA accurate after 20 to 21 days of exposure? And also this came with my results. RNA is not detected. No laboratory evidence of HIV infection. The HIV-1 RNA qualitative TMA assay is recommended for use as part of a multi-test HIV-1/HIV-2 screening and diagnostic algori... Read Full »
Dermatologist, HIV AIDS Specialist, Venereologist
Answer: Hi, Welcome to icliniq.com. HIV RNA PCR test is accurate after 9 to 13 days after the risk exposure. It can be used to detect early infection with HIV when most other screening tests are not yet reliable. However, it is not a confirmatory test and an early screening with RNA PCR should be followed... Read Full »
Query: Hello doctor,I have a query related to HIV. I had visited a massage parlor 57 days ago, where at the end I had fingered the masseuse for about one to one and a half minute and she performed a hand job (no other activities). I have a habit of biting my nail and the skin around the nail. The day befor... Read Full »
Dermatologist
Answer: Hello, Welcome to icliniq.com. The chance of transmission of HIV by the given description is almost nil. The wound in your finger (if at all present) most likely would have partially dried up. The skin is an effective barrier for HIV. The chances of transmission would be almost nil. The HIV RNA P... Read Full »
Most Viewed
Streakiness seen in X-ray of lower lung. Could this be IPF?
Hello doctor, I am a 62-year-old male. I went for a routine X-ray, and the radiologist found some streakiness in the lo ...Read more »
How can I manage headache and depression caused due to abuse?
Hello doctor, I am very much feeling depressed due to some health issues. I am having a constant headache due to abuse. ...Read more »
Meprate 10 MG Tablet - Uses, Side Effects, Substitutes, Compositions, Dosage
Meprate is a progestin (a form of progesterone), which is used as a contraceptive pill. It inhibits ovulation by inhibit ...Read more »