[Standardization of a microtechnic for passive hemagglutination to detect antibodies against infectious bovine rhinotracheitis].

A micromethod for passive Hemagglutination is described for the detection of IBR antibodies in serum samples of nine herds. The samples correspond to different zones of the province Buenos Aires. In animals without clinical signs the proportion of positives was 43.60%; in herds with signs consistent with the disease, this value attained 66.4% positivity (Tables 1 and 2). The feasibility of this method is discussed. Some variants introduced into the original technique are described.