Related Experiment Videos
Insights
A 1978 Chicago rubella outbreak led to 31 congenital rubella syndrome (CRS) cases. Most mothers lacked rubella vaccination, highlighting the need for adult female immunization programs.
Area of Science:
- Pediatrics
- Infectious Diseases
- Public Health
Background:
- An outbreak of rubella occurred in Chicago in 1978.
- Congenital rubella syndrome (CRS) is a serious consequence of maternal rubella infection during pregnancy.
Purpose of the Study:
- To identify the incidence and characteristics of congenital rubella syndrome (CRS) following a 1978 rubella outbreak in Chicago.
- To assess risk factors and vaccination status among mothers of infants with CRS.
- To evaluate the effectiveness of prenatal rubella screening and vaccination programs.
Main Methods:
- Intensive survey of healthcare personnel and hospital records to identify infants with CRS.
- Isolation of rubella virus and detection of rubella-specific IgM antibodies in affected infants.
- Review of prenatal rubella hemagglutination-inhibition (HI) testing and follow-up immunization data.
Main Results:
- 31 infants were diagnosed with CRS.
- Rubella virus or antibodies were confirmed in a significant proportion of cases.
- The incidence of CRS was 48.9 per 100,000 live births.
- Mothers of infants with CRS frequently reported illness during pregnancy, were unmarried, and were first-time mothers.
- None of the mothers had received rubella vaccination.
- Low uptake of rubella vaccination among seronegative women in one hospital.
Conclusions:
- The study underscores the significant public health impact of rubella outbreaks and the vulnerability of pregnant women to infection.
- Maternal rubella infection during pregnancy, particularly in unvaccinated women, leads to a high risk of congenital rubella syndrome.
- There is a critical need for enhanced emphasis on the detection and vaccination of susceptible adult women to prevent future CRS cases.
Abstract:
After an outbreak of rubella in Chicago in 1978, an intensive survey of local health care personnel and hospital records identified 31 infants with congenital rubella syndrome (CRS). Rubella virus was isolated from 11 infants; rubella-IgM antibodies were demonstrated in seven infants; ten babies had persistent high rubella hemagglutination-inhibition (HI) titers. The incidence of CRS in Chicago between July 1978 and June 1979 was 48.9 per 100,000 live births. Mothers of babies with CRS frequently remembered a crash-illness during pregnancy (56%), were unmarried (74%), and were primigravidas (64%). No mother had received rubella vaccine. Review of prenatal rubella HI testing and follow-up immunization in one hospital showed that only eight (10.8%) of 74 seronegative women received rubella vaccine physicians need to place increased emphasis on detection and vaccination of susceptible adult women.