"In vivo" recombination of pseudorabies virus [in the swine]

animal biotechnology aujeszky virus aujeszky's disease biotechnologie animale biotecnologia animal biotecnologia animale cerdo enfermedad de aujeszky in vivo experimentation maladie d'aujeszky malattia di aujeszky porcin recombinaison recombination ricombinazione servicios veterinarios servizi veterinari sperimentazione in vivo swine vaccin vaccination vaccinazione vaccines vaccini vacuna veterinary services virologia virologie virology virus d'aujeszky virus de aujeszky virus di aujeszky