CONSEQUENCE TO SEROLOGICAL EXAMINATIONS I N BLOOD ACCORDING TO THE DIAGNOSIS OF RHINITIS ATROPHICANS

In a period of three years in 95 breeding-herds, which were free from Rhinitis atrophicans (R. a.), 5001 bloodsamples were examined. All sam ples were examined by the SNT/EBL-cellculturetest - mostly however by the SNT/ELISA-system - and were free of antibodies against R. a. On th e contrary in 6 herds, that had bought swines from latent infected pop ulations, antibodies against the toxin could be found before clinical signs were to be seen and before toxin producing pasteurellas could be discovered, too. In other 4 herds antibodies against R. a. could be f ound. In the last mentioned herds R. a. was suspected by clinical, bac teriological and pathomorphological examinations. The serological dete rmination of blood may replace the provement of the diameter of the no se by pathomorphological diagnosis. The serological investigation is a good test. After positive results of antibodies comprehensive bacteri ological tests should follow. This can be integrated in the diagnostic al system of R. a. very easily, because enough blood samples will be t aken ordered by the official examinations for European Swinefever - an d Aujeszky-disease.