HIV Antibody Screening and Confirmation (Serum/Plasma)
This test detects antibodies to the human immunodeficiency virus (HIV), which your body produces in response to infection. It helps determine if you have been exposed to HIV.
["HIV antibody tests screen for past or current infection by detecting your immune system’s response to the virus."]
Key facts at a glance
- LOINC
- 33806-1
- Short code
- HIV 2 IgG Ser Ql IB
- Synonyms
- HIV 2 IgG Ser Ql IB
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- ib
- CPT
- 82784
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
This test is done to find out whether you have an infection, even if you feel completely healthy. Many infections cause no symptoms in the early stages, so testing is the only reliable way to know your status. Finding an infection early lets you start treatment sooner, protect your partners, and lower the risk of long-term health problems.
HIV antibody tests are typically ordered as part of routine screening, especially if you have risk factors for HIV, such as unprotected sexual contact, shared needles, or living in areas with higher HIV prevalence. They may also be recommended during pregnancy, before certain medical procedures, or as part of regular health check-ups if you’re at higher risk.
During the test, a small sample of blood, urine, or a swab from the affected area is collected and sent to a laboratory. The lab checks the sample for the virus or bacteria that causes the infection, or for antibodies your body produces in response. Results are typically ready within a few days, and your provider will explain what they mean.
This test uses a blood sample (serum or plasma) to identify antibodies against HIV. The test is usually performed using an immunoassay method, which detects specific proteins (antibodies) your immune system creates after exposure to the virus. Results are qualitative, meaning they indicate only whether antibodies are present or not.
Very little preparation is needed for this test. Drink water beforehand if a urine sample will be collected, but avoid cleaning the genital area right before your visit, since that can affect the results. If instructed, do not urinate for at least one hour before testing, and bring a list of any medicines or supplements you currently take.
No special preparation is needed for this test. You may have a small needle inserted into your arm to draw blood, and you’ll rest for a few minutes afterward. If you’re pregnant, breastfeeding, or have a bleeding disorder, let your healthcare provider know before the test.
After the test, you can return to your normal activities right away. If blood was drawn, the puncture site may feel slightly tender or show mild bruising for a short time, which usually goes away on its own. Your healthcare provider will contact you with the results and discuss any follow-up testing, treatment, or preventive steps you may need.
After your blood is drawn, you’ll be able to return to your normal activities immediately. The lab will process your sample and report results to your healthcare provider within a few days. You’ll receive a written report with your results, but it’s important to discuss them with your doctor for interpretation.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical Significance
Short name
HIV Antibody Test
Frequently asked questions
If your test is positive, it means your body has detected HIV antibodies, suggesting past or current infection. However, false positives can occur, so follow-up testing (like a confirmatory HIV antibody test) may be needed. If negative, it means no detectable antibodies were found, but this does not guarantee you are not infected—HIV testing should be repeated if you have risk factors or symptoms.
HIV antibodies may take 2–12 weeks to develop after exposure, so early testing may not detect infection. If you’ve had recent exposure, your doctor may recommend testing at specific intervals (e.g., 3 months post-exposure) or use a different test (like a nucleic acid test) for earlier detection.
A positive HIV antibody test indicates that your body has detected HIV antibodies, meaning you may have been infected. This requires medical evaluation, including confirmatory testing and counseling to discuss next steps, such as treatment options or referrals to support services.
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy