Field trials to test the efficacy of polyvalent Marek's disease vaccines in layer and broiler breeder chickens.

@article{Witter1985FieldTT,
  title={Field trials to test the efficacy of polyvalent Marek's disease vaccines in layer and broiler breeder chickens.},
  author={Richard L. Witter and Jagadish M Sharma and W B Chase and David A. Halvorson and V Sivanandan},
  journal={Poultry science},
  year={1985},
  volume={64 12},
  pages={2280-6}
}
As a follow-up to earlier trials to evaluate the efficacy of polyvalent Marek's disease (MD) vaccines in broilers, four trials were conducted with layer or broiler breeder flocks. Chickens caccinated with trivalent (Md11/75C plus SB-1 plus HVT) and bivalent (SB-1 plus HVT) vaccines were compared with those vaccinated with turkey herpesvirus (HVT) alone. Data from three of the four trials indicated polyvalent vaccines were more efficacious than HVT. However, critical interpretations were… CONTINUE READING