Rubella (German Measles) Avidity, IgG

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Author Details

Reviewed By

Dr.Rohini priyanaka

Written By

Dr.Ezhilrasan

Last Updated

Jul 24, 2025 | 12:17 PM IST

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Test(s) Included (1)

Rubella (German Measles) Avidity, IgG
1 test included

About

SAMPLE TYPE

BLOOD

GENDER

Both

AGE GROUP

7 years & above

This test can help determine Rubella-specific IgG avidity in human plasma or serum to differentiate between acute and past infection. The presence of Rubella Virus IgG antibodies indicates the occurrence of Rubella infection. However, it does not differentiate between recent and past Rubella infections. Rubella is also called German measles. It can cause a mild fever and rash that subsides within a few days. For pregnant women, Rubella can be very serious. If infected in the first four months, the baby can have hearing, eye, heart problems or have an early birth.

Frequently Asked Questions (FAQs)

How is the blood sample taken?

A tourniquet (elastic) band is placed tightly on the upper arm to take the blood sample. The patient is then asked to make a fist. This helps in the build-up of blood filling the veins, making it easy to collect the blood. The skin is cleaned before inserting the needle in the vein to prevent bacteria from entering. Needle is inserted into the vein of the arm and the blood sample is collected in the vacutainer.

Will, I need to do any special preparation for this test?

You may not need any special preparations for this test.

What are the risks that occur with the Rubella avidity test?

There is minimal risk involved in having a blood test. You may have a bruise or slight pain at the site where the blood was drawn from, but most symptoms subside quickly.

Why this test is ordered?

A rubella blood test is ordered to check for antibodies to the rubella virus. Your doctor can tell about the type of antibodies present in the blood. IgM is the first antibody made by the immune system after you get Rubella. It will sticks around for 7 to 10 days in adult people and up to a year in new-born babies. IgG will stay in the bloodstream for life. The presence of this antibody tells that you had either the illness or the vaccine in the past for Rubella. You should be tested for both antibodies if you're pregnant and if your doctor suspects that you have a rubella infection. Your new-born baby may also need both tests immediately after birth.

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The information mentioned above is meant for educational purposes only and should not be taken as a substitute to your Physician’s advice. It is highly recommended that the customer consults with a qualified healthcare professional to interpret test results