Virus
Rubella virus
German measles and congenital rubella
roo-BELL-uh VY-rus
High-yield clue
Mild rash with posterior auricular/occipital lymphadenopathy, but severe congenital rubella syndrome after first-trimester infection, is the key clue.
Overview
An enveloped positive-sense RNA virus, recently reclassified into family Matonaviridae, that causes a mild rash illness in children but is a major teratogen when acquired early in pregnancy.
Classification
- RNA virus
- Positive-sense single-stranded RNA
- Enveloped
- Family Matonaviridae, genus Rubivirus (Rubivirus rubellae)
Lab & identification clues
- Rubella-specific IgM/IgG serology vocabulary
- RT-PCR detection concept
- Congenital rubella screening vocabulary
- Matonaviridae reclassification note
Associations
- 'Three-day measles' / German measles rash
- Congenital rubella syndrome (cataracts, cardiac defects, deafness)
- Respiratory-droplet and transplacental transmission
- MMR vaccine prevention history
Commonly confused with
- Measles virus
- Parvovirus B19
Frequently asked questions
What is Rubella virus?
An enveloped positive-sense RNA virus, recently reclassified into family Matonaviridae, that causes a mild rash illness in children but is a major teratogen when acquired early in pregnancy.
What are the lab clues for Rubella virus?
Lab clues for Rubella virus include Rubella-specific IgM/IgG serology vocabulary, RT-PCR detection concept, Congenital rubella screening vocabulary, and Matonaviridae reclassification note.
What is Rubella virus commonly confused with?
Rubella virus is commonly confused with Measles virus and Parvovirus B19.
Original student-study summary. Sources checked: OpenStax Microbiology 2e, NCBI Bookshelf Medical Microbiology, and CDC topic pages where applicable; reviewed 2026-06. Educational only; no diagnosis, treatment, dosing, or specimen-handling guidance.