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Serum and egg yolk IgG antibody titers from laying chickens vaccinated with Pasteurella multocida. 1998
Y S Ling, and
Y J Guo, and
J D Li, and
L K Yang, and
Y X Luo, and
S X Yu, and
L Q Zhen, and
S B Qiu, and
G F Zhu
Guangdong Provincial Poultry Science Research Institute, Shijing, Guangzhou, P. R. China.
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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