Respiratory syncytial virus antibodies

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Blood test

RSV antibody test is a blood test that measures the levels of antibodies (immunoglobulins) against the viral infection respiratory syncytial virus (RSV).

RSV antibody test; RSV serology

Blood is drawn from a vein, usually on the inside of the elbow or the back of the hand. The puncture site is cleaned with antiseptic, and an elastic band is placed around the upper arm to apply pressure and restrict blood flow through the vein. This causes veins below the band to fill with blood.

A needle is inserted into the vein, and the blood is collected in an air-tight vial or a syringe. During the procedure, the band is removed to restore circulation. Once the blood has been collected, the needle is removed, and the puncture site is covered to stop any bleeding.

No restrictions of food or fluid are required for this test.

If your child is to have this test performed, it may be helpful to explain how the test will feel (even practice or demonstrate on a doll). The more familiar your child is with what will happen to them, and the purpose for the procedure, the less anxiety they will feel.

When the needle is inserted to draw blood, some people feel moderate pain, while others feel only a prick or stinging sensation. Afterward, there may be some throbbing.

This test detects the body's response to RSV, not the virus itself. If the body has produced antibodies against RSV, then either a current or past infection has occurred.

In infants, RSV antibodies which have been passed from mother to baby may also be detected.

Review Date: 06/09/2005
Reviewed By: Camille Kotton, M.D., Infectious Diseases Division, Massachusetts General Hospital, Boston, MA. Review provided by VeriMed Healthcare Network.