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Safety, immunogenicity, and induction of immunologic memory by a serogroup C meningococcal conjugate vaccine in

J M MacLennan1, F Shackley, P T Heath

  • 1Department of Child Health, St George's Hospital Medical School, Cranmer Terrace, London, SW17 0RE, England. pheath@sghms.ac.uk

JAMA
|June 6, 2000
PubMed

Insights

A new meningococcal C conjugate vaccine is safe and effective in infants. It stimulates a strong immune response and creates lasting immunologic memory against serogroup C meningococcal disease.

Area of Science:

  • Pediatric Infectious Diseases
  • Vaccinology
  • Immunology

Background:

  • Neisseria meningitidis is a leading cause of infant meningitis and septicemia globally.
  • The efficacy of meningococcal C conjugate vaccines in infants was previously unestablished.

Purpose of the Study:

  • To assess the safety and immunogenicity of a novel meningococcal C conjugate vaccine in infants.
  • To determine if the vaccine induces immunologic memory.

Main Methods:

  • A double-blind, randomized controlled trial involving 182 healthy infants.
  • Infants received either the meningococcal C conjugate vaccine or a hepatitis B control vaccine at 2, 3, and 4 months of age.
  • Immunogenicity was measured by serum antibody levels and bactericidal activity at multiple time points, with a booster dose at 12 months.

Main Results:

  • The meningococcal C conjugate vaccine was well-tolerated with no significant safety concerns.
  • Infants receiving the conjugate vaccine demonstrated significantly higher antibody concentrations and serum bactericidal activity compared to controls after primary vaccination.
  • These elevated antibody levels persisted at 12 months and showed a robust response after a booster dose.

Conclusions:

  • The meningococcal C conjugate vaccine is safe and immunogenic in infants when administered with routine immunizations.
  • The vaccine effectively induces immunologic memory, providing sustained protection against serogroup C Neisseria meningitidis.
Abstract

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