title: Pneumococcal conjugate vaccine primes for polysaccharide-inducible IgG2 antibody response in children with recurrent otitis media acuta.
abstract: Children with frequent recurrent episodes of otitis media may have a deficient IgG2 antibody response to polysaccharide antigens. Five otitis-prone children were vaccinated with heptavalent pneumococcal conjugate vaccine. While all had an IgG1 antibody response to all pneumococcal serotypes included in the conjugate vaccine, the IgG2 response, especially to serotypes 6B, 9V, 19F, and 23F, was poor. However, vaccination with a 23-valent polysaccharide vaccine 6 months after conjugate vaccination induced an 11.5- to 163-fold increase in IgG2 anti-polysaccharide antibody titers. Thus, an IgG2 polysaccharide antibody deficiency can be overcome by priming with a pneumococcal conjugate vaccine followed by a booster with a polyvalent polysaccharide vaccine.
authors: Department of Immunology, Wilhelmina Children's Hospital, 3508A Utrecht, The Netherlands. mbreukels@wkz.azu.nl
authors: M A
authors: MA
authors: Breukels
authors: G T
authors: GT
authors: Rijkers
authors: M M
authors: MM
authors: Voorhorst-Ogink
authors: B J
authors: BJ
authors: Zegers
authors: L A
authors: LA
authors: Sanders
mesh_terms: D000907:Antibodies, Bacterial / Q000097:blood; D001428:Bacterial Vaccines / Q000008:administration & dosage / Q000276:immunology*; D002648:Child; D002675:Child, Preschool; D000069443:Heptavalent Pneumococcal Conjugate Vaccine; D006801:Humans; D007117:Immunization, Secondary; D007074:Immunoglobulin G / Q000097:blood*; D022401:Meningococcal Vaccines; D010033:Otitis Media / Q000276:immunology* / Q000517:prevention & control; D011008:Pneumococcal Infections / Q000276:immunology*; D022242:Pneumococcal Vaccines; D011135:Polysaccharides, Bacterial / Q000276:immunology*; D012008:Recurrence; D012703:Serotyping; D013296:Streptococcus pneumoniae / Q000276:immunology*; D014611:Vaccination; D018074:Vaccines, Conjugate / Q000008:administration & dosage / Q000276:immunology
chemical_list: D000907:Antibodies, Bacterial; D001428:Bacterial Vaccines; D000069443:Heptavalent Pneumococcal Conjugate Vaccine; D007074:Immunoglobulin G; D022401:Meningococcal Vaccines; D022242:Pneumococcal Vaccines; D011135:Polysaccharides, Bacterial; D018074:Vaccines, Conjugate