title: Immunogenicity of a hexavalent combination vaccine in rhesus monkeys.
abstract: Preclinical immunogenicity studies were conducted in rhesus monkeys to determine whether there is immune interference in the response to one or more components of a hexavalent vaccine (Hexavac) that contains antigens from Haemophilus influenzae (Hib), hepatitis B (HB), diphtheria (D), tetanus (T), acellular pertussis (aP) and inactivated polio virus (IPV). Antibody responses were measured following co-administration of the components at three separate anatomical sites or administration as a hexavalent combination in a single site. After three injections of the hexavalent vaccine, the peak antibody responses to each component of the vaccine were >100-fold above pre-immune titers and persisted at levels >10-fold above pre-immune titers at approximately 1 year. Immune interference was observed in the peak response to HB, D and pertussis toxin, but was not seen at later time points. The results indicate that the rhesus monkey model may be useful for pre-clinical evaluation of combination vaccines.
authors: Department of Virus and Cell Biology, Merck Research Laboratories, West Point, PA 19486, USA. michael_caulfield@merck.com
authors: M J
authors: MJ
authors: Caulfield
authors: J G
authors: JG
authors: Smith
authors: S
authors: S
authors: Wang
authors: R C
authors: RC
authors: Capen
authors: C
authors: C
authors: Blondeau
authors: S
authors: S
authors: Lentsch
authors: F
authors: F
authors: Arminjon
authors: A
authors: A
authors: Sabouraud
mesh_terms: D000818:Animals; D000907:Antibodies, Bacterial / Q000097:blood; D000914:Antibodies, Viral / Q000097:blood; D004168:Diphtheria Toxoid / Q000008:administration & dosage / Q000276:immunology; D018073:Haemophilus Vaccines / Q000008:administration & dosage / Q000276:immunology; D017325:Hepatitis B Vaccines / Q000008:administration & dosage / Q000276:immunology; D008253:Macaca mulatta; D010567:Pertussis Vaccine / Q000008:administration & dosage / Q000276:immunology; D011054:Poliovirus Vaccine, Inactivated / Q000008:administration & dosage / Q000276:immunology; D013745:Tetanus Toxoid / Q000008:administration & dosage / Q000276:immunology; D017778:Vaccines, Combined / Q000008:administration & dosage* / Q000276:immunology*
chemical_list: D000907:Antibodies, Bacterial; D000914:Antibodies, Viral; D004168:Diphtheria Toxoid; D018073:Haemophilus Vaccines; D017325:Hepatitis B Vaccines; D010567:Pertussis Vaccine; D011054:Poliovirus Vaccine, Inactivated; D013745:Tetanus Toxoid; D017778:Vaccines, Combined