Otitis Media Clinical Trial
Official title:
Maternal Immunization To Prevent Infant Otitis Media
The main objective of this study is to evaluate whether immunization with 9-valent pneumococcal conjugate vaccine (PNCRM9) during the third trimester of pregnancy interferes with active antibody production in offspring immunized with PNCRM7 (Prevnar) in the first six months of life.
There were 24.5 million physician visits for otitis media (OM) in 1990 with estimated treatment and indirect costs of $5 billion. Because of its major public health impact and the troubling increase in antibiotic resistant organisms, vaccine strategies to prevent OM are being tested. We previously proposed an efficacy study to determine if immunization with pneumococcal vaccine during pregnancy protects offspring against early infant OM, which is an important predictor for recurrent and chronic OM. Recent data from an efficacy trial in California demonstrated that infants immunized with 7-valent pneumococcal conjugate vaccine (PNCRM7) at 2, 4, 6 and 12 - 15 months were protected against invasive pneumococcal disease after 7 months of age. Since licensure of this vaccine, questions have been raised about whether maternal immunization with a pneumococcal vaccine during pregnancy suppresses active antibody production in offspring who are immunized with 7-valent pneumococcal conjugate vaccine (PNCRM7). The main objective of this study is to investigate that question. We will also evaluate vaccine safety, immunogenicity, and fetal antibody transfer among women who receive 9-valent pneumococcal conjugate vaccine (PNCRM9) at 30 - 35 weeks of pregnancy, determine persistence of maternal and infant antibody 13 months after birth, evaluate opsonic activity of maternal and infant antibody, and determine the relationship between breast milk and serum antibody in lactating women. ;
Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor), Primary Purpose: Prevention
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