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Rubella

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Contents of this page:

Illustrations

Rubella on an infant's back
Rubella on an infant's back
Rubella
Rubella
Antibodies
Antibodies

Alternative names    Return to top

Three day measles; German measles

Definition    Return to top

Rubella is a contagious viral infection with mild symptoms associated with a rash.

Causes, incidence, and risk factors    Return to top

The disease is caused by a virus that is spread through the air or by close contact. It can also be transmitted to a fetus by a mother with an active infection, causing severe disease in the fetus. In children and adults, rubella is usually mild and may even go unnoticed.

Children generally have few symptoms, but adults may experience fever, headache, malaise, and a runny nose before the rash appears. A person can transmit the disease from 1 week before the onset of the rash, until 1-2 weeks after the rash disappears. The disease is less contagious than rubeola (measles). Lifelong immunity to the disease follows infection, and there is a safe and effective vaccine to prevent rubella.

Rubella is most serious because of its ability to produce defects in a developing fetus if the mother is infected during early pregnancy. Congenital rubella syndrome occurs in 25% or more of infants born to women who acquired rubella during the first trimester of pregnancy.

Defects are rare if the infection occurs after the 20th week of pregnancy. One or more defects may occur in an infected fetus and include deafness, cataracts, microcephaly, mental retardation, congenital heart defects, and other problems. A miscarriage or stillbirth may occur.

Risk factors include lack of immunization and exposure to an active case of rubella.

Symptoms    Return to top

Signs and tests    Return to top

Treatment    Return to top

There is no treatment for this disease. Acetaminophen can be given to reduce fever. The treatment of congenital rubella syndrome is for the defects that may be present.

Expectations (prognosis)    Return to top

Rubella is usually a mild, self-limited infection.

About 25% or more infants born to mothers infected with rubella during early pregnancy will develop congenital rubella syndrome associated with a poor outcome.

Complications    Return to top

Calling your health care provider    Return to top

Call for an appointment with your doctor if:

Prevention    Return to top

Rubella is preventable with vaccination. Rubella virus vaccine is recommended for all children. It is routinely given between 12 and 15 months of age, but is sometimes given earlier during epidemics. A second vaccination (booster) is routinely given between the ages of 4 to 6. MMR immunization (vaccine) is a combination vaccine that protects against measles, mumps, and rubella.

Women of child-bearing age may be screened by rubella serology. If immunity is not present, immunization can be given if conception can be prevented for 28 days after the vaccination. Vaccination should not be given at any time during pregnancy or to a person with an immune system altered by cancer, corticosteroid therapy, or radiation treatment.

Although great care is taken not to give vaccine to an already pregnant woman, in the rare instances where that has occurred, no abnormalities have been detected in the infants.

Update Date: 9/26/2003

Updated by: A.D.A.M. editorial. Previously reviewed by Adam Ratner, M.D., Children's Hospital of Philadelphia, Philadelphia, PA. Review provided by VeriMed Healthcare Network (1/31/2002).

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The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed physician should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. Copyright 2002 A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.