Journal
PEDIATRIC INFECTIOUS DISEASE JOURNAL
Volume 32, Issue 2, Pages 169-174Publisher
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/INF.0b013e3182787bff
Keywords
Haemophilus influenzae type b; Neisseria meningitidis serogroup C; antibody persistence; toddlers
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Funding
- GlaxoSmithKline Biologicals, Rixensart, Belgium
- Commonwealth Serum Laboratory (CSL)
- Roche
- Sanofi
- GlaxoSmithKline
- Pfizer (Wyeth)
- Wyeth
- Nutricia
- Octapharma
- Baxter
- CSL
- National Health and Medical Research Council of Australia [1016272]
- GlaxoSmithKline Biologicals
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Background: Persistence of seroprotective bactericidal antibody titers is important for long-term protection against meningococcal serogroup C disease in young children. Antibody persistence values were determined in children up to 3 years after vaccination with a single dose of the combined Haemophilus influenzae type b (Hib)-Neisseria meningitidis serogroup C (MenC)-tetanus toxoid (TT) conjugate vaccine (Hib-MenC-TT;www.ClinicalTrials.gov: NCT00326118). Methods: The children had been randomized at ages 12-18 months to receive either 1 dose of Hib-MenC-TT (Hib-MenC group) or separately administered Hib-TT conjugate vaccine and MenC-CRM197 (MCC) vaccine (Hib plus MCC group). All children had been primed in infancy with a Hib vaccine. Antibodies against MenC were measured by a serum bactericidal assay using rabbit complement (rSBA-MenC) and antibodies against Hib polyribosylribitol phosphate were assessed by enzyme-linked immunosorbent assay. Results: The rSBA-MenC titers >= 1: 8 were demonstrated 3 years after vaccination in 64.2% and 53.2% of participants in the Hib-MenC group and in the Hib plus MCC group, respectively. Antipolyribosylribitol phosphate concentrations >= 0.15 mu g/mL persisted in > 98% of participants in both groups. The rSBA-MenC geometric mean titers and antipolyribosylribitol phosphate geometric mean concentrations remained higher 3 years after vaccination than before vaccination. No serious adverse events assessed by the investigator as being related to vaccination were reported. Conclusion: In this antibody persistence study of Hib-primed but MenCnaive toddlers who received a single dose of Hib-MenC-TT, protective antibody levels against Hib and MenC were maintained in the majority of children 3 years after vaccination.
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