Inmunogenicidad e inducción de memoria inmunológica de la vacuna antineumocócica conjugada heptavalente en lactantes prematuros del Reino Unido

Translated title of the contribution: Immunogenicity and induction of immunological memory of the heptavalent pneumococcal conjugate vaccine in preterm UK infants

J. U. Ruggeberg, C. Collins, P. Clarke, N. Johnson, R. Sinha, N. Everest, J. Chang, E. Stanford, P. Balmer, Raymond Borrow, S. Martin, M. J. Robinson, E. R. Moxon, A. J. Pollard, P. T. Heath*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Data on the immunogenicity and memory induction of pneumococcal conjugate vaccines in very preterm infants is limited. We vaccinate 69 full term and 68 preterm infants (median gestational age (GA) 30 weeks) with a 7-valent pneumococcal conjugate vaccine (PCV7) at 2/3/4 months of age, followed by a plain polysaccharide booster at 12 months of age. IgG-GMC (ELISA) was significantly lower in preterm infants to six vaccine serotypes (ST) at 2 months and 5 months of age, to five ST at 12 months of age and to three ST at 13 months of age. A significantly lower proportion of preterm infants achieved IgG levels ≥ 0.35 μg/ml to ST 4, 6B and 9V at 5 months and to ST 4, 6B, 18C, 19F and 23F at 12 months of age. Fold rises following the polysaccharide booster were comparable to those of term infants. At least 93% of both cohorts achieved IgG ≥ 0.35 μg/ml to all STs following booster vaccination. Pneumococcal conjugate vaccine at an accelerated schedule of 2/3/4 months of age is likely to provide protection against pneumococcal disease for preterm infants. Antibody concentrations wane over the first year of life in both preterm and term infants and booster vaccination is therefore likely to be important.

Translated title of the contributionImmunogenicity and induction of immunological memory of the heptavalent pneumococcal conjugate vaccine in preterm UK infants
Original languageSpanish
Pages (from-to)82-90
Number of pages9
JournalVacunas
Volume8
Issue number2
Publication statusPublished - 1 Apr 2007

Keywords

  • Immunological memory
  • Pneumococcal conjugate vaccine
  • Prematurity

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