[Micro-epidemiology and micro-plaque titration of infectious bovine rhinotracheitis virus on primary calf kidney cells by means of immunofluorescence].

Immunofluorescence was used to study the virus of infectious bovine rhinotracheitis and the course of infection in cell cultures of calf kidney. An indirect relationship was found to exist between the magnitude of inoculation and the onset of specific fluorescence. Fluorescent plaques are formed as a result of inoculate dilution.

[Suitability of immune serums from different animal species for the preparation of conjugates against Aujeszky's disease virus].

A comparison was made of immune serum from rabbits, sheeps, pigs and cattle. Pure IgG was prepared by the Rivanol sulphate method and immune electrophoresis. Optimum protein quality, conjugation time under various conditions and using two preparations of fluorescein isothiocyanate were studied.