Serum and egg yolk IgG antibody titers from laying chickens vaccinated with Pasteurella multocida |
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Authors: | YS Ling YJ Guo JD Li LK Yang YX Luo SX Yu LQ Zhen SB Qiu GF Zhu |
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Affiliation: | Guangdong Provincial Poultry Science Research Institute, Shijing, Guangzhou, P. R. China. |
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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. |
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