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HIV Antibody Test (Qualitative, Plasma/Serum) – HIV-1 Antibody Screening

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

This test detects antibodies to the human immunodeficiency virus (HIV-1), which your immune system produces in response to the virus. It helps determine if you may have been exposed to HIV.

Quick summary

["This screening helps identify possible HIV infection early, supporting timely medical evaluation and care."]

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

Key facts at a glance

LOINC
35445-6
Short code
HIV1 p51 Ab Sal Ql IB
Synonyms
HIV1 p51 Ab Sal 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
86701
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

What This Test Measures

The test looks for HIV-1 antibodies in your blood plasma or serum. Antibodies are proteins your body makes to fight the virus. If you’ve been exposed to HIV, your body may produce these antibodies within weeks to months. This test does not directly measure the virus itself but indicates whether your immune system has responded to it.

How the Test Works

This is a qualitative immunoassay (often a chemiluminescent immunoassay or similar method) that detects specific antibodies against HIV-1. A positive result suggests exposure, but further testing is needed to confirm infection.

Why It’s Done

Doctors may order this test if you have risk factors for HIV (e.g., unprotected sex, shared needles, or exposure in healthcare settings), symptoms of infection, or as part of routine screening in certain populations.

What to Expect Before the Test

No special preparation is needed. You’ll have a small blood sample drawn from your arm. The test is quick and typically done in a lab or clinic setting.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

HIV Antibody Screen (Qualitative)

Frequently asked questions

What does a positive result mean?
A positive result means your test may show antibodies to HIV-1, indicating possible exposure. This does not confirm HIV infection alone—further testing is required to diagnose the virus.
How soon can I get results?
Results are usually available within 1–3 business days, depending on lab processing times. Follow-up instructions will be provided by your healthcare provider.
Can I get this test at home?
No, this test is typically done in a clinical or laboratory setting. Home HIV tests are available but detect different markers (e.g., p24 antigen) and are not the same as this antibody screening.
  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