Related Experiment Videos
Rubella-specific IgM in reinfection and risk to the fetus
M Zolti1, Z Ben-Rafael, D Bider
1Department of Obstetrics and Gynecology, Chaim Sheba Medical Center, Tel Hashomer, Israel.
Abstract:
A case of reinfection with the wild rubella virus in the 8th gestational week is reported. The patient had preexisting hemagglutination inhibition antibodies of low titer following immunization with rubella vaccine. Reinfection was accompanied by clinical symptoms and the presence of rubella-specific immunoglobulin M (IgM) of high titer. Following termination of pregnancy no rubella virus could be isolated from the fetal tissues and the fetal blood contained no specific IgM antibodies. These results should encourage the use of cordocentesis before decision on interruption of pregnancy.
Insights
A vaccinated woman experienced rubella reinfection during early pregnancy. Despite symptoms and high IgM, the fetus showed no signs of infection, suggesting cordocentesis is valuable before pregnancy termination decisions.
Area of Science:
- Virology
- Immunology
- Obstetrics
Background:
- Rubella infection during pregnancy poses risks to fetal development.
- Vaccination aims to prevent rubella, but breakthrough infections can occur.
- Assessing fetal rubella status is crucial for pregnancy management.
Observation:
- A case of wild rubella virus reinfection in an immunized patient at 8 weeks gestation.
- The patient presented with clinical symptoms and high-titer rubella-specific immunoglobulin M (IgM).
- Preexisting low-titer hemagglutination inhibition antibodies were noted post-vaccination.
Findings:
- Following therapeutic termination of pregnancy, no rubella virus was detected in fetal tissues.
- Fetal blood samples lacked rubella-specific IgM antibodies.
- The absence of fetal infection suggests successful containment or lack of transmission.
Implications:
- Cordocentesis can provide definitive fetal status assessment for rubella.
- This diagnostic approach aids in informed decisions regarding pregnancy interruption.
- Further research into rubella reinfection dynamics and fetal outcomes is warranted.