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Antibody Screening for Immunoglobulin G (IgG) Class to HIV-1 (Qualitative)

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

This test checks for antibodies in your blood that may indicate past or current exposure to HIV, the virus that causes AIDS. It’s part of routine screening for sexually transmitted infections.

Quick summary

["A simple blood test to help detect HIV antibodies, which can signal exposure to the virus."]

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

Key facts at a glance

LOINC
81736-1
Short code
Deprecated RNAp III Ab Ser Ql IB
Synonyms
Deprecated RNAp III Ab 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
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

How the Test Works

Your blood sample is tested using an immunoassay method to detect specific antibodies (IgG) produced by your immune system in response to HIV. If these antibodies are present, it suggests you may have been exposed to the virus, though results alone don’t confirm infection.

Sample Collection

A small blood sample is taken from your arm using a needle. The process is quick and typically causes minimal discomfort. You may experience a slight pinch or bruising afterward.

Test Preparation

No special preparation is needed. You can eat, drink, or take medications as usual on the day of your test.

What to Expect After Testing

Results are usually available within 24–48 hours. If positive, further testing (like a confirmatory HIV antibody test) will be recommended to confirm exposure.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

While this screening test helps identify potential exposure, it’s not a definitive HIV diagnosis. Positive results prompt additional testing to rule out false positives or confirm infection. Early detection allows for timely medical evaluation and support.

Short name

HIV IgG Screen

Frequently asked questions

Why did my doctor order this test?
Your doctor may recommend this test if you have risk factors for HIV (e.g., unprotected sex, shared needles, or recent travel to high-risk areas) or if you’re part of a group at higher risk for sexually transmitted infections.
What does a positive result mean?
A positive result means your blood contains antibodies that may indicate HIV exposure, but it doesn’t confirm the virus is actively replicating in your body. You’ll need follow-up testing to determine if you’re infected.
Can I still have sex after this test?
Yes, but it’s important to discuss your results with your healthcare provider. If you’re at risk, they may recommend safer sex practices or additional testing to monitor your health.
  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