Antibodies to infectious bovine rhinotracheitis [IBR], rift valley fever [RVF] and bluetongue [BT] viruses in sheep sera

A total of 106 sheep sera were tested for the presence of neutralizing antibodies against IBR and RVF viruses and precipitating antibodies against BT virus. The results indicated that 13.2, 28.3 and 41.5% of the tested sera were seropositive to IBR, RVF and BT viruses, respectively