What causes rubella positive in pregnancy?
Robert Miller
Published Mar 11, 2026
What causes rubella positive in pregnancy?
Rubella is caused by a virus that’s passed from person to person. It can spread when an infected person coughs or sneezes. It can also spread by direct contact with an infected person’s respiratory secretions, such as mucus. It can also be passed on from pregnant women to their unborn children via the bloodstream.
What is rubella AB screen?
A rubella blood test detects antibodies that are made by the immune system to help kill the rubella virus. These antibodies remain in the bloodstream for years. The presence of certain antibodies means a recent infection, a past infection, or that you have been vaccinated against the disease.
What is rubella IgM positive in pregnancy?
Test results, explained Rubella IgM indicates current or very recent infection; IgM NEGATIVE means that the patient does not have a new infection. IgM POSITIVE usually means a new or recent infection with the Rubella virus, although in rare cases IgM may persist for years after a previous infection or immunisation.
What does rubella AB IgG mean?
The presence of IgM rubella antibodies in the blood indicates a recent infection while the presence of IgG antibodies may indicate a recent or past rubella infection, or indicate that a rubella vaccine (a measles, mumps, rubella vaccine) has been given and is providing adequate protection.
Is a positive rubella test good?
A positive rubella IgG test result is good—it means that you are immune to rubella and cannot get the infection. This is the most common rubella test done. Negative: This means you are not immune to rubella.
What if rubella IgG is positive in pregnancy?
A positive test is 1.0 or higher. That means you have rubella antibodies in your blood and are immune to future infection. A negative test is 0.7 or lower.
Is rubella good or bad?
Rubella is a viral illness that causes a skin rash and joint pain. A rubella infection is mild for most people, but it can have catastrophic consequences for an unborn baby. If a pregnant woman contracts rubella, her baby is at risk of severe and permanent birth defects or death.
What is the normal range of rubella IgG in pregnancy?
Reference Range: 7 IU/mL or less: Negative – No significant level of detectable rubella IgG antibody. 8-9 IU/mL: Equivocal – Repeat testing in 10-14 days may be helpful. 10 IU/mL or greater: Positive – IgG antibody to rubella detected, which may indicate a current or previous exposure/immunization to rubella.
What are the symptoms of rubella in pregnancy?
What are the symptoms of rubella?
- A low-grade fever and mild aches and pains, sometimes red eyes.
- A rash of pink or light red spots that start on the face and spread down to the rest of the body.
- Neck glands may swell up and feel tender, especially behind the ears.
Should I get rubella before pregnancy?
The best protection against rubella is the MMR (measles-mumps-rubella) vaccine. If you aren’t up to date with the MMR vaccine, you’ll need it before you get pregnant. Make sure you have a pre-pregnancy blood test to see if you are immune to the disease.
What happens if rubella IgG is positive?
Can rubella IgG positive cause miscarriage?
Pregnant women who contract rubella are at risk for miscarriage or stillbirth, and their developing babies are at risk for severe birth defects with devastating, lifelong consequences. CRS can affect almost everything in the developing baby’s body. The most common birth defects from CRS can include: Deafness.