title: Prolonged culture of Visna virus in human astrocytes.
mesh_terms: D002460:Cell Line; D006801:Humans; D008722:Methods; D009457:Neuroglia; D012328:RNA Viruses / Q000254:growth & development*; D013997:Time Factors; D014776:Virus Cultivation; D014790:Visna-maedi virus / Q000254:growth & development