[Immunoprevention of infection to alimentary tract of calves with use of K99 E. Coli antogen as a stimulator of homologous and xenogeneic specifity antibodies]

antigene antigens biological properties calves cows disease resistance enfermedades intestinales escherichia coli gestation immunoglobuline immunoglobulins immunotherapy inmunoglobulina inmunoterapia intestinal diseases maladie intestinale pregnancy resistencia a la enfermedad serotipos serotypes ternero vaca vaccin vaccination vaccines vache vacuna veau