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  • Title: Prevalence of rubella antibodies in a non-immunized urban population, São Paulo, Brazil. The Division of Immunization, CVE.
    Author: Souza VA, Moraes JC, Sumita LM, Camargo MC, Fink MC, Hidalgo NT, Pannuti CS.
    Journal: Rev Inst Med Trop Sao Paulo; 1994; 36(4):373-6. PubMed ID: 7732269.
    Abstract:
    The prevalence of rubella antibodies was evaluated through a random seroepidemiological survey in 1400 blood samples of 2-14 year old children and in 329 samples of umbilical cord serum. Rubella IgG antibodies were detected by ELISA, and the sera were collected in 1987, five years before the mass vaccination campaign with measles-mumps-rubella vaccine carried out in the city of São Paulo in 1992. A significant increase in prevalence of rubella infection was observed after 6 years of age, and 77% of the individuals aged from 15 to 19 years had detectable rubella antibodies. However, the seroprevalence rose to 90.5% (171/189) in cord serum samples from children whose mothers were 20 to 29 years old, and reached 95.6% in newborns of mothers who were 30 to 34 years old, indicating that a large number of women are infected during childbearing years. This study confirms that rubella infection represents an important Public Health problem in São Paulo city. The data on the seroprevalence of rubella antibodies before the mass vaccination campaign reflects the baseline immunological status of this population before any intervention and should be used to design an adequate vaccination strategy and to assess the seroepidemiological impact of this intervention.
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