title: Serum and egg yolk IgG antibody titers from laying chickens vaccinated with Pasteurella multocida.
abstract: Through determining the serum and egg yolk antibody titers in immunized laying hens to Pasteurella multocida regularly, the growth-decline trend of the egg yolk antibody levels was found to be similar to that of the serum antibody levels (r = 0.94), but the growth and decline of the egg yolk antibody seemed to be delayed 3-6 days compared with that of the serum antibody, and the egg yolk antibody titers were generally lower than those of the serum antibody (P < 0.01). Serum and egg yolk antibody levels declined 3 and 6 days, respectively, after booster immunizations. The higher the antibody levels were before booster immunization, the more they declined.
authors.affiliation: Guangdong Provincial Poultry Science Research Institute, Shijing, Guangzhou, P. R. China.
authors.forename: Y S
authors.initials: YS
authors.lastname: Ling
authors.forename: Y J
authors.initials: YJ
authors.lastname: Guo
authors.forename: J D
authors.initials: JD
authors.lastname: Li
authors.forename: L K
authors.initials: LK
authors.lastname: Yang
authors.forename: Y X
authors.initials: YX
authors.lastname: Luo
authors.forename: S X
authors.initials: SX
authors.lastname: Yu
authors.forename: L Q
authors.initials: LQ
authors.lastname: Zhen
authors.forename: S B
authors.initials: SB
authors.lastname: Qiu
authors.forename: G F
authors.initials: GF
authors.lastname: Zhu
mesh_terms: D000818:Animals; D000907:Antibodies, Bacterial / Q000032:analysis / Q000097:blood; D001428:Bacterial Vaccines; D002645:Chickens; D004530:Egg Yolk / Q000276:immunology*; D007115:Immunization Schedule; D007117:Immunization, Secondary; D007074:Immunoglobulin G / Q000032:analysis* / Q000097:blood; D010326:Pasteurella Infections / Q000276:immunology / Q000517:prevention & control / Q000662:veterinary*; D016979:Pasteurella multocida / Q000276:immunology; D011201:Poultry Diseases
chemical_list: D000907:Antibodies, Bacterial; D001428:Bacterial Vaccines; D007074:Immunoglobulin G