title: Immunologic response to early and routine DTP immunization in infants.
abstract: The effect of early immunization, prior to discharge from the newborn nursery, on subsequent immunity as determined by enzyme-linked immunosorbent assay (ELISA) immunoglobulin (Ig) M and IgG antibody titers to filamentous hemagglutinin and lymphocytosis-promoting toxin (LPT) of Bordetella pertussis and by standard pertussis agglutinin titers was investigated. Eighteen infants received routine diphtheria-tetanus-pertussis (DTP) immunization at 2, 4, and 6 months of age; 17 other infants received routine immunization and an additional DTP immunization in the newborn nursery. Antibody was determined on samples of cord blood and whole blood obtained at 4, 6, and 9 months of age. IgM anti-filamentus hemagglutinin was significantly higher at 4 and 6 months of age in the group that received early immunization (P less than .05). There was no significant difference in IgM anti-LPT, IgG anti-filamentus hemagglutinin, IgG anti-LPT, or pertussis agglutinin antibodies. Six control infants had high cord IgG anti-LPT titers. These six infants had significantly lower antibody titers to LPT at 6 and 9 months of age when compared with control with control infants with lower cord titers. Thirteen infants in the early immunization group with lower cord IgG anti-LPT titers achieved significantly lower titers at 9 months of age than the 12 comparable infants in the control group.
mesh_terms: D001427:Bacterial Toxins / Q000378:metabolism; D001886:Bordetella pertussis; D004168:Diphtheria Toxoid / Q000009:adverse effects / Q000276:immunology*; D015721:Diphtheria-Tetanus-Pertussis Vaccine; D004338:Drug Combinations / Q000009:adverse effects / Q000276:immunology; D004797:Enzyme-Linked Immunosorbent Assay; D005312:Fetal Blood / Q000276:immunology; D006386:Hemagglutination Tests; D006801:Humans; D007074:Immunoglobulin G / Q000378:metabolism; D007075:Immunoglobulin M / Q000378:metabolism; D007231:Infant, Newborn; D010567:Pertussis Vaccine / Q000009:adverse effects / Q000276:immunology*; D013745:Tetanus Toxoid / Q000009:adverse effects / Q000276:immunology*; D010566:Virulence Factors, Bordetella
chemical_list: D001427:Bacterial Toxins; D004168:Diphtheria Toxoid; D015721:Diphtheria-Tetanus-Pertussis Vaccine; D004338:Drug Combinations; D007074:Immunoglobulin G; D007075:Immunoglobulin M; D010567:Pertussis Vaccine; D013745:Tetanus Toxoid; D010566:Virulence Factors, Bordetella