title: Precipitation of visna viral proteins by immune sera of rabbits and sheep.
abstract: Eighteen polypeptides equivalent to 1.2 x 10(6) daltons of visna virus were specifically precipitated by immune sera from rabbits and sheep. The hyperimmunized rabbit antisera contained high concentrations of antibodies against p25 and p14, whereas the sera from sheep actively infected with visna virus showed a large quantity of anti-gp115 antibody. The results indicate that almost all the polypeptides reported previously (F. H. Lin, J. Virol. 25:207--214, 1978) are virus-specific components of visna. The presence of anti-gp115 antibody in sera of infected sheep may offer a simple and sensitive diagnostic procedure for visna.
mesh_terms: D000818:Animals; D011232:Chemical Precipitation; D007106:Immune Sera / Q000276:immunology*; D008970:Molecular Weight; D011817:Rabbits / Q000276:immunology; D012756:Sheep / Q000276:immunology; D014764:Viral Proteins / Q000032:analysis / Q000276:immunology*; D014790:Visna-maedi virus / Q000032:analysis / Q000276:immunology*
chemical_list: D007106:Immune Sera; D014764:Viral Proteins