[Findings on infectious bovine rhinotracheitis (author's transl)].

Findings on infectious bovine rhinotracheitis (IBR) since this disease was diagnosed for the first time in the province of Gelderland in 1973, are reported. The clinical picture varies markedly, unmistakable symptoms are followed by a period of impaired health in a number of cases. There is no evidence to suggest that this impaired state of health is due to the causative virus of IBR. The number of infected herds is constantly increasing and is currently estimated at approximately 20 per cent. The disease also shows an increasing incidence in veal-calf herds. Intranasal vaccination will afford adequate protection of other members of the herd in the event of IBR but the immunity produced is short-lived.