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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 body makes in response to the virus. Antibodies are proteins that help fight infection.

Quick summary

["HIV antibody screening helps detect early signs of infection, even before symptoms appear."]

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

Key facts at a glance

LOINC
11609-5
Short code
HTLV I Ab Ser-aCnc
Synonyms
HTLV I Ab Ser-aCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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?

This test measures the presence of HIV antibodies in your serum. Antibodies are part of your immune system’s defense against the virus. If your body has been exposed to HIV, it will produce these antibodies. The test looks for these antibodies to determine if HIV is present in your system.

Why Is This Test Important?

Early detection of HIV is crucial for managing the infection and preventing complications. This screening test helps identify potential exposure before symptoms develop, allowing for timely medical intervention.

How Is the Sample Collected?

A blood sample is drawn from a vein in your arm using a small needle. The blood is then processed to separate the serum, which is tested for HIV antibodies.

What Should You Expect Before or After the Test?

Before the test, you may have some mild discomfort from the needle prick, but it usually goes away quickly. Afterward, you might experience a small bruise or swelling at the injection site, which typically fades within a few days. You can resume normal activities immediately.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

HIV Antibody Screen

Frequently asked questions

How often should I get this test if I’m at risk?
If you are at increased risk for HIV (e.g., unprotected sex, shared needles, or other behaviors), your healthcare provider may recommend regular testing, often every 3 to 6 months. Follow their guidance based on your individual risk factors.
What if my test result is positive?
A positive result means your blood test detected HIV antibodies, indicating possible infection. You will need further testing to confirm the diagnosis and begin appropriate medical care right away. Your healthcare provider will guide you through next steps, including treatment options and support services.
Can I still have sex or share needles if my test is positive?
No, if you test positive for HIV, it’s important to avoid high-risk behaviors like unprotected sex or sharing needles to prevent spreading the virus to others. Your healthcare provider will help you manage your health and reduce transmission risk through medication and counseling.
  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