HIV Antibody Screening Test (Serum/Plasma)

How the Test Works

The test uses an immunoassay method to detect HIV antibodies in your serum or plasma. If HIV is present in your blood, your immune system produces antibodies against it. These antibodies can be detected through a blood sample drawn from your arm.

What to Expect Before the Test

No special preparation is needed for this test. You may eat or drink as usual before your appointment. If you’re taking blood, you’ll typically sit comfortably while a healthcare provider inserts a small needle into your vein to collect a blood sample.

After the blood draw, you may feel a brief pinch or discomfort. Apply gentle pressure to the site to stop any bleeding. Most people return to their normal activities immediately. If you experience excessive bruising or pain, contact your healthcare provider.

This test is performed on either serum (liquid part of blood after clotting) or plasma (liquid part of blood without clotting). Your healthcare provider will specify which type is used based on lab protocols.

Your healthcare provider may recommend this test if you have risk factors for HIV, such as unprotected sexual contact, sharing needles, or other behaviors that increase exposure risk. It’s also commonly used as part of routine testing for sexually transmitted infections (STIs).

Everyone should consider getting tested for HIV at least once in their lifetime, especially if they have risk factors. Regular testing is recommended for people who have sex with multiple partners, use drugs, or have other health conditions that put them at higher risk.