title: Induction of immunologic memory in infants primed with Haemophilus influenzae type b conjugate vaccines.
abstract: The ability of different Haemophilus influenzae type b conjugate vaccines to induce immunologic memory was compared in 381 infants who were vaccinated with one of three conjugate vaccines beginning at 2 months of age. All infants were vaccinated with unconjugated type b capsular polysaccharide, polyribosylribitol phosphate (PRP), at 12 months. In each group, high antibody responses were detected by 6-9 days after vaccination. One month after receiving PRP, infants primed with PRP conjugated to the outer membrane protein of Neisseria meningitidis or PRP oligomers conjugated to the cross-reactive mutant diphtheria protein, CRM197, had twofold higher total anti-PRP antibody concentrations than did infants primed with PRP conjugated to tetanus toxoid (P < .005). After the conjugate and the PRP boost, notable differences were present among vaccine groups with respect to the magnitude of the IgG anti-PRP antibody concentrations and light chain variable region usage as determined by idiotypic analysis. Thus, each of the conjugate vaccines primed infants for the ability to evoke memory antibody responses to PRP, but qualitative and quantitative differences in priming induced by different vaccines may affect their ability to confer protection against disease.
authors.affiliation: Edward Mallinckrodt Department of Pediatrics, Washington University School of Medicine, St. Louis, MO 63110.
authors.forename: D M
authors.initials: DM
authors.lastname: Granoff
authors.forename: S J
authors.initials: SJ
authors.lastname: Holmes
authors.forename: M T
authors.initials: MT
authors.lastname: Osterholm
authors.forename: J E
authors.initials: JE
authors.lastname: McHugh
authors.forename: A H
authors.initials: AH
authors.lastname: Lucas
authors.forename: E L
authors.initials: EL
authors.lastname: Anderson
authors.forename: R B
authors.initials: RB
authors.lastname: Belshe
authors.forename: J L
authors.initials: JL
authors.lastname: Jacobs
authors.forename: F
authors.initials: F
authors.lastname: Medley
authors.forename: T V
authors.initials: TV
authors.lastname: Murphy
mesh_terms: D001425:Bacterial Outer Membrane Proteins / Q000276:immunology; D001426:Bacterial Proteins / Q000276:immunology; D001428:Bacterial Vaccines / Q000276:immunology*; D004167:Diphtheria Toxin / Q000276:immunology; D006192:Haemophilus Infections / Q000517:prevention & control*; D006193:Haemophilus influenzae / Q000276:immunology*; D006801:Humans; D007117:Immunization, Secondary; D007070:Immunoglobulin A / Q000097:blood; D007074:Immunoglobulin G / Q000097:blood; D007130:Immunoglobulin Idiotypes / Q000097:blood; D007075:Immunoglobulin M / Q000097:blood; D007156:Immunologic Memory; D007223:Infant; D009345:Neisseria meningitidis / Q000276:immunology; D011134:Polysaccharides / Q000276:immunology; D011135:Polysaccharides, Bacterial / Q000276:immunology
chemical_list: D001425:Bacterial Outer Membrane Proteins; D001426:Bacterial Proteins; D001428:Bacterial Vaccines; D004167:Diphtheria Toxin; D007070:Immunoglobulin A; D007074:Immunoglobulin G; D007130:Immunoglobulin Idiotypes; D007075:Immunoglobulin M; D011134:Polysaccharides; D011135:Polysaccharides, Bacterial; C028581:CRM197 (non-toxic variant of diphtheria toxin); C008984:polyribitol phosphate