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HIV-1 Antibody Screening Test (Qualitative)

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

This test detects antibodies to the human immunodeficiency virus (HIV), which your body makes in response to the virus. It helps determine if you’ve been exposed to HIV.

Quick summary

["This screening test checks for HIV antibodies to help identify potential exposure early."]

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

Key facts at a glance

LOINC
29327-4
Short code
HIV1 Ab Fld Ql
Synonyms
HIV1 Ab Fld Ql
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

What This Test Measures

The test looks for HIV-1 antibodies in your blood or plasma. Antibodies are proteins your immune system produces after exposure to HIV. If present, they indicate past or possible recent infection.

How the Test Works

This is a qualitative immunoassay (IA) test. Your blood sample is tested to detect specific antibodies against HIV-1. If antibodies are found, it suggests exposure, though further testing is needed to confirm active infection.

Why It’s Done

Doctors use this test as part of routine screening, especially for high-risk groups (e.g., sexually active individuals, those with multiple partners, or those with HIV-related risk behaviors). It’s also used in pre-exposure prophylaxis (PrEP) monitoring and routine health checkups.

What to Expect

You’ll typically provide a blood sample via a simple venipuncture. Results are usually available within 24–48 hours. Follow-up testing (e.g., confirmatory HIV-1 antibody detection) may be required if the initial screen is positive.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

A positive result means antibodies to HIV-1 are detected, which may indicate past exposure. However, it does not confirm active infection. A positive screen always requires additional testing (e.g., HIV-1 antibody/determination test) to diagnose HIV. Early detection is critical for managing infection and preventing transmission.

Short name

HIV Antibody Screen (Qual)

Frequently asked questions

How long does it take to get results?
Results are usually available within 24–48 hours from the time your sample is processed. Some labs may provide results sooner, but follow-up instructions will guide next steps.
What if my test is positive?
A positive screening test means you may have been exposed to HIV. Your doctor will order additional confirmatory tests to determine if you have active HIV infection. Treatment and support options will be discussed based on results.
Can I still have sex if my screening test is positive?
If your test is positive, it’s important to discuss safe practices with your healthcare provider. HIV can be transmitted through unprotected sex, and treatment options (like PrEP) can reduce risk. Always follow guidance from your doctor.
  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