| molecular differentiation between ns1 gene of a field strain bluetongue virus serotype 2 (btv-2) and ns1 gene of an attenuated btv-2 vaccine. | at the end of september 2000, clinical symptoms of bluetongue appeared in sheep flocks of the balearic islands (spain). the presence of the btv serotype 2 in tissue and blood samples of affected animals was confirmed by laboratory techniques. a systematic vaccination were carried out in affected areas using a live monovalent serotype 2 vaccine available from onderstepoort laboratory (south africa). in order to perform epidemiological studies, a new method to differentiate between the ns1 genes o ... | 2002 | 11955783 |