Effect of genetics, vaccine dosage, and postvaccination sampling interval on early antibody response to Salmonella enteritidis vaccine in broiler breeder chicks
1998
Kaiser, M.G. | Wing, T. | Lamont, S.J.
Broiler breeder chicks of two different genetic lines were evaluated for early antibody response to Salmonella enteritidis (SE) vaccine. Antibody responses to three dosages of SE vaccine administered at 22 d of age were measured at 3, 6, and 10 d postvaccination. Within each line, antibody levels at 10 d postvaccination were significantly higher than at either 3 or 6 d postvaccination. At all vaccine dosages, there was a significant antibody-response difference between the genetic lines at 6 and 10 d postvaccination. The vaccine dosage significantly affected antibody levels in one of the two genetic lines. These results demonstrate a genetic component of early antibody response to SE vaccine in broiler breeder chicks.
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