[Delayed hypersensitivity reactions against brucellins prepared with various brucellar strain in cattle vaccinated with mutant strains of Brucella abortus]

bovin bovini brucella brucella abortus brucellose brucellosi brucellosis brucelosis cattle cell mediated immunity ganado bovino immune response inmunidad celular ispezione postmortem lesiones lesioni lesions live vaccines necropsie postmortem examination risposta immunitaria servicios veterinarios servizi veterinari vaccin vivant vaccination vaccinazione vaccini vivi vacuna viva veterinary services