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Human Immunodeficiency Virus (HIV) Antibody Screening, Serum

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

This test checks for antibodies to the human immunodeficiency virus (HIV), which your immune system makes in response to the virus. Antibodies are proteins that help identify and fight infections, including HIV.

Quick summary

["HIV antibody screening helps detect past or current infection, guiding next steps in care."]

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

Key facts at a glance

LOINC
59586-8
Short code
HLA IgG Ser Ql IF
Synonyms
HLA IgG Ser Ql IF
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
if
CPT
82784
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 Does This Test Measure?

The test looks for HIV antibodies in your blood serum. These antibodies develop after your body has been exposed to HIV, typically within weeks to months after infection. This screening does not directly measure the virus itself but indicates whether your immune system has responded to it.

Why Is This Test Ordered?

Doctors may recommend this test for routine screening, especially in high-risk groups (e.g., sexually active individuals, people with multiple sexual partners, or those with HIV-related risk factors). It may also be used during pregnancy, before organ transplants, or as part of ongoing monitoring for HIV exposure.

What to Expect Before the Test

No special preparation is needed. You’ll have a small needle inserted into your arm to draw blood. The process takes a few minutes, and you may feel a brief pinch. If you’re pregnant or have a bleeding disorder, let your healthcare provider know beforehand.

What to Expect After the Test

After the blood draw, you may experience mild bruising, soreness, or swelling at the site. Apply gentle pressure to stop any bleeding, and avoid vigorous activity for a few hours. Rest and monitor the area for signs of infection (e.g., increased pain, redness, or warmth).

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. Follow-up testing (e.g., viral load or Western blot) will confirm HIV status and guide treatment. A negative result means no detectable antibodies, but HIV could still be present if tested too early. Always discuss results with your healthcare provider to interpret them accurately and plan next steps.

Short name

HIV Antibody Screen

Frequently asked questions

How Accurate Is This Test?
This screening test is highly accurate for detecting HIV antibodies in most cases. However, it may not detect infection if tested too early (within weeks of exposure). For early detection, additional testing (e.g., nucleic acid testing) may be needed. False positives are rare but can occur due to cross-reactions with other viruses.
What If My Test Result Is Positive?
A positive result means you may have HIV. Your healthcare provider will order additional tests to confirm the diagnosis and determine your viral load. Early treatment can control the virus, prevent complications, and improve long-term health. You’ll work with your doctor to develop a care plan, including regular check-ups and medication if needed.
What If My Test Result Is Negative?
A negative result means no detectable HIV antibodies at the time of testing. However, HIV can still be present if tested too soon after exposure. If you suspect recent exposure, ask your doctor about retesting or other diagnostic options. If you’re at high risk, discuss prevention strategies (e.g., pre-exposure prophylaxis) with your healthcare provider.
  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