[Experiences with local administration of herd-specific vaccines]

The results of oral vaccination of 388 calves with herd-specific vaccines against E. coli are described. Innocuity was optimal, whereas the potency was estimated not as efficient as parenteral vaccination of the dam (in 22% of the cases), i.e., transient diseases in vaccinated calves occurred there. Further the results of intranasal vaccination of 496 cattle against salmonellosis are reported. Salmonella excretion in the faeces was stopped within 1-3 weeks post vaccination in 75% of the herds. In one case it took 3 months to reach this effect. A few permanent excretor cattle remained in two other cases.