[I.B.R (author's transl)].

The clinical pictures which may be produced by IBR/IPV virus in cattle are briefly reviewed. Up to the autumn of 1972, infection occurred only sporadically in the Netherlands, no typical cases of IBR having been reported up to the fall of that year. Since the winter of 1972-1973 IBR has increasingly been diagnosed, particularly during the winter months. It may, however, be mistaken for other infections of the respiratory tract. The infection apears to be spreading. The clinical features, diagnosis, epizootiology and methods of treatment are discussed. Administration of a vaccine may be indicated in some herds where IBR-virus is present or its introduction is to be expected. In that case, inoculation of a monospecific vaccine, directed against IBR virus only is to be preferred to the use of combination vaccines.