Abstract

Discussion and ConclusionEmbryonic skin culture of domestic rabbit was infected with Shope papilloma virus in vitro and the early phase of virus-cell interaction was studied sequentially up to 30-hours post infection by the immunofluorescence technique. The cells of infected cultures showed a specific fluorescent reaction in the nucleus when stained with antipapilloma antisera conjugated with FITC. The ratio of positively stained cells was about 20% of the whole cell population in cultures 5-6 hours after infection with the virus and it reached a maximum of approximately 90% at around 11 hours. The morphological pattern of the intranuclear fluorescent staining was reminiscent of the reaction of T antigen reported in the SV40-infected hamster cells (6).Kreider et al. (7) have recently reported their findings on the persistence of Shope papilloma virus absorbed onto the cell surface of cells of in vitro cultured embryonic skin of rabbits. The viral antigen was detectable in cultured cells even after 6-days ...

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