Abstract: The techniques of group virological and serological diagnosis for the two orbi-viruses of Ovine Bluetongue and the Heamorrhagic disease of deer are well developed. Very recently, thee commercial test for the molecular and serological diagnosis of the virus of haemorrhagic disease of deer became available to complete the range of diagnostic tools. However, numerous difficulties exist for the identification of the serotypes of HDD or those of Ovine Bluetongue that have not been present in the population