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HIV 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 have been exposed to HIV.

Quick summary

["This screening identifies potential 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
109411-9
Short code
HIV1 Ab Msmt Fld
Synonyms
HIV1 Ab Msmt Fld
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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

Why This Test Matters

HIV screening is crucial for early detection, as early diagnosis allows for prompt treatment and management to improve health outcomes. This test is often used as part of routine health checks, especially for individuals at higher risk of infection.

How the Test Works

The test uses a blood sample (serum or plasma) to detect HIV antibodies through an immunoassay method. If antibodies are present, it suggests past or current infection, though further testing (like confirmation) may be needed.

Sample Collection and Preparation

A small blood sample is drawn from your arm, typically in a clinic or lab setting. The blood is processed to separate serum or plasma for testing. This process is quick and generally well-tolerated.

What to Expect Before the Test

No special preparation is needed, but inform your healthcare provider if you’re taking medications or have conditions that might affect blood results. Avoid alcohol before testing if advised by your provider.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

HIV Antibody Screen

Frequently asked questions

A positive result indicates the presence of HIV antibodies, signaling potential infection. While this test is highly sensitive, it may not detect HIV immediately after exposure (window period). Confirmatory testing is often required for diagnosis.
This test is not a definitive diagnosis but an important first step. If results are positive, further testing (like Western blot or PCR) will confirm HIV status and guide next steps in care.
What does a positive result mean?
A positive result means your blood contains antibodies to HIV, which could indicate past or current infection. Next steps will involve follow-up testing to confirm the diagnosis and determine your health needs.
How soon can I get results?
Results are typically available within 1–3 business days, depending on lab processing times. Your healthcare provider will discuss results and next steps with you.
  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