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HIV-1 Antibody Screening Test (Serum/Plasma)

Published: August 9, 2026Updated: August 16, 2026

This test detects antibodies to the human immunodeficiency virus (HIV), which your body produces in response to infection. It helps determine if you may have been exposed to HIV.

Quick summary

["This test screens for HIV antibodies, a key step in early detection of infection."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
109769-0
Short code
HIV1 RNA Msmt CSF
Synonyms
HIV1 RNA Msmt CSF
Category
chemistry
Sample
csf
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
86701
Specimen volume
1-2 mL
Stability
Immediate analysis required, Refrigerated: 1h
Hemolysis max
200
TAT
4–24 hours
Order
routine

Why This Test Is Done

Your healthcare provider may recommend this test if you have risk factors for HIV, such as unprotected sex, shared needles, or other behaviors that increase exposure. It’s also part of routine testing for certain groups (e.g., pregnant individuals, people with sexually transmitted infections).

How the Test Works

The test uses a blood sample (serum or plasma) to check for HIV antibodies. If you have been infected, your immune system will produce antibodies within weeks to months after exposure. This test screens for these antibodies to identify possible infection.

Test Preparation

No special preparation is needed. You may have a small needle inserted into your arm to draw blood. If you’re pregnant, breastfeeding, or have certain medical conditions, let your provider know before testing.

What to Expect After the Test

After your blood is drawn, you’ll likely feel a brief pinch. The site may sting slightly. You can resume normal activities immediately. Results may take a few days to weeks, depending on lab processing.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

A positive result means your blood contains HIV antibodies, suggesting past or current infection. A negative result means no detectable antibodies at the time of testing, but HIV could still be present if you were infected recently. Follow-up testing (e.g., viral load or Western blot) may be needed for confirmation. Early detection is critical for managing HIV and improving health outcomes.

Short name

HIV Antibody Screen

Frequently asked questions

How soon can I get my results?
Results typically take 1 to 2 weeks from the time your blood sample is received by the lab. Some labs may offer same-day or next-day results for urgent cases, but this depends on your healthcare provider’s protocol.
What does a positive result mean?
A positive result indicates that your blood contains HIV antibodies, which means you may have been infected. This does not confirm the exact timing of infection or the current viral load. Your healthcare provider will guide you on next steps, which may include additional testing or referral to a specialist.
Can I have false positives or false negatives?
False positives are rare but possible, especially if you have an autoimmune condition or recent vaccination. False negatives are more likely if you were infected recently (within weeks to months) or if the test was done too soon after exposure. If your test is negative but you suspect exposure, ask your provider about retesting.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

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.

Medical Disclaimer

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