title: Immunologic study and optimization of Salmonella delivery strains expressing adhesin and toxin antigens for protection against progressive atrophic rhinitis in a murine model.
abstract: Mice were intranasally inoculated at various times to optimize the vaccination strategy with a new live candidate vaccine expressing the antigens CP39, FimA, PtfA, and ToxA of Pasteurella multocida and F1P2 of Bordetella bronchiseptica in an attenuated live Salmonella system to protect against progressive atrophic rhinitis (PAR). Sixty BALB/c mice were divided equally into 4 groups. The group A mice were vaccinated only at 12 wk of age, the group B mice received a primary vaccination at 9 wk of age and a booster at 12 wk of age, the group C mice received a primary vaccination at 6 wk of age and boosters at 9 and 12 wk of age, and the group D mice were inoculated intranasally with sterile phosphate-buffered saline as a control. The humoral and mucosal immune responses of groups A, B, and C increased significantly compared with those of the control group. Expression of the cytokines interleukin-4 and interferon-γ in splenocytes also increased significantly. In addition, the group B mice exhibited significantly fewer gross lesions in lung tissue compared with the other vaccinated groups after challenge with a virulent P. multocida strain. These results indicate that a strategy of double intranasal vaccination can optimize protection against PAR.
authors.affiliation: Veterinary Public Health, College of Veterinary Medicine, Chonbuk National University, Jeonju 561-756, Republic of Korea.
authors.forename: Jin
authors.initials: J
authors.lastname: Hur
authors.affiliation: Veterinary Public Health, College of Veterinary Medicine, Chonbuk National University, Jeonju 561-756, Republic of Korea.
authors.forename: Hoyeon
authors.initials: H
authors.lastname: Byeon
authors.affiliation: Veterinary Public Health, College of Veterinary Medicine, Chonbuk National University, Jeonju 561-756, Republic of Korea.
authors.forename: John Hwa
authors.initials: JH
authors.lastname: Lee
mesh_terms: D018829:Adhesins, Bacterial / Q000235:genetics / Q000276:immunology; D000818:Animals; D000907:Antibodies, Bacterial / Q000097:blood; D000942:Antigens, Bacterial / Q000235:genetics / Q000276:immunology; D001428:Bacterial Vaccines / Q000235:genetics / Q000276:immunology*; D003001:Cloning, Molecular; D004195:Disease Models, Animal; D005260:Female; D051379:Mice; D008807:Mice, Inbred BALB C; D010326:Pasteurella Infections / Q000276:immunology / Q000382:microbiology / Q000517:prevention & control / Q000662:veterinary*; D016979:Pasteurella multocida / Q000276:immunology*; D012222:Rhinitis, Atrophic / Q000276:immunology / Q000382:microbiology / Q000517:prevention & control / Q000662:veterinary*; D012475:Salmonella / Q000276:immunology*; D018709:Statistics, Nonparametric; D013552:Swine; D013553:Swine Diseases / Q000276:immunology / Q000382:microbiology* / Q000517:prevention & control
chemical_list: D018829:Adhesins, Bacterial; D000907:Antibodies, Bacterial; D000942:Antigens, Bacterial; D001428:Bacterial Vaccines