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Rubella

Mild viral exanthem with severe teratogenic potential in pregnancy

Written by: Saygı Hospital Health Guide Editorial Board
Published:

This content is for general information; please consult your physician for diagnosis and treatment.

References (5)

This content is for informational purposes only and does not constitute medical advice. You can book an appointment at our Internal Medicine department. Book Appointment →

What is Rubella?

Rubella virus is a single-stranded RNA togavirus with one serotype, transmitted by respiratory droplets. The incubation period is 14–21 days, and virus may be shed from the nasopharynx from 1 week before to 1 week after rash onset.

Post-natal rubella presents with mild prodrome, lymphadenopathy (especially postauricular and suboccipital), and a transient maculopapular rash starting on the face. About 50% of infections in adults/older children are subclinical.

Primary infection in pregnancy can cause fetal infection via transplacental spread. Risk of congenital rubella syndrome (CRS) is highest (up to 85%) when infection occurs before 12 weeks and declines sharply after 20 weeks' gestation.

CRS features include sensorineural deafness, congenital cataracts, congenital heart disease (patent ductus arteriosus, peripheral pulmonary stenosis), microcephaly, intellectual disability, hepatosplenomegaly, and 'blueberry muffin' rash from extramedullary hematopoiesis.

Symptoms

Low-grade fever, malaise, headache, sore throat in prodrome
Tender lymphadenopathy (postauricular, suboccipital, posterior cervical)
Pink/light red maculopapular rash starting on face, spreading to trunk and limbs, fading by day 3
Arthralgia and arthritis (especially in adult women) affecting small joints of hands, wrists, knees
Forchheimer spots (petechiae on soft palate) in some cases
Neonates with CRS: cataracts, deafness, cardiac anomalies, microcephaly, failure to thrive

Risk Factors

Unvaccinated or incompletely vaccinated individuals (no MMR)
Pregnant women lacking immunity (critical risk for fetus)
Travel to or residence in regions with low MMR coverage
Immigrants from countries without routine rubella vaccination
Healthcare workers, childcare workers, educators without documented immunity
Immunosuppression may alter clinical picture but transmission pattern similar

When to See a Doctor?

If you experience any of the following symptoms, seek medical attention promptly:

  • Any pregnant woman with a rubella-like rash, known exposure, or positive contact should be urgently evaluated with serology (IgM, IgG, avidity) and referred to obstetric/infectious diseases specialists for counseling and monitoring.
  • Any patient with suspected rubella should be isolated and reported to public health authorities for contact tracing; neonates with suspected CRS require multidisciplinary evaluation.
  • Persistent arthritis, neurological signs (rare encephalitis), or purpuric rash (rare thrombocytopenia) warrant medical assessment.

Treatment Methods

01
No specific antiviral therapy; supportive care for symptoms — analgesia, antipyretics, rest, hydration.
02
Droplet isolation for 7 days after rash onset in post-natal rubella; infants with CRS can shed virus for ≥1 year and require isolation from susceptible pregnant women and infants.
03
Pregnant women exposed to rubella: measure IgM/IgG; if susceptible and infected, offer counseling regarding risk of CRS and discuss management options per local guidelines.
04
Post-exposure immunoglobulin not recommended routinely — may attenuate but not prevent viremia/fetal infection; MMR is contraindicated in pregnancy.
05
Newborn with CRS: multidisciplinary management — audiology, ophthalmology, cardiology, neurology, developmental services; hearing aids, cochlear implant consideration, surgical correction of cataracts and cardiac anomalies.
06
Prevention: routine two-dose MMR vaccination; pre-pregnancy screening and immunization of rubella-susceptible women; health worker immunity documentation; WHO rubella elimination program targets ≥95% MMR coverage.

Which Department to Visit?

You can visit our Enfeksiyon Hastalıkları department for these complaints. Our specialist physicians will create the most suitable treatment plan for you.

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Health Disclaimer: The information on this page is prepared for general informational purposes only. It does not replace medical diagnosis and treatment. Please consult your physician for your complaints. Saygı Hospital does not accept responsibility for actions taken based on the information on this page.