Abstract: A process is described for purifying vesicular stomatitis virus (VSV) from cell culture fluid of a mammalian cell culture infected with VSV, the process comprising: clarifying the cell culture fluid by low-speed centrifugation and recovering the VSV in the supernatant; filtering the supernatant through a 0.2 to 0.45 ?m filter and recovering the VSV in the filtered solution; loading the VSV filtered solution onto a anion exchange membrane adsorber equilibrated with a first pH buffered salt solution, eluting the VSV from the anion exchange membrane adsorber with a second pH buffered salt solution and recovering the eluted VSV fractions; purifying the recovered VSV by tangential flow filtration (TFF) using a TFF membrane having a molecular weight cutoff between 300 kDa and 1,000 kDa and recovering the VSV in the retentate, and filtering the VSV retentate through a 0.2 to 0.22 ?m filter and recovering the VSV in the filtered solution.

Abstract: The present invention relates to methods for generating genetically modified and attenuated strains of vesicular stomatitis virus (VSV) for use in the preparation of immunogenic compositions. More particularly, the invention relates to the identification of particular genetic modifications of attenuated VSV that result in an increased yield of virus and an increase in stability of the attenuated strains for preparation of the immunogenic compositions. Methods for cell culture propagation and use in large scale production of VSV is also disclosed.

Abstract: Novel purification processes for obtaining vesicular stomatitis virus (VSV) of improved purity from mammalian cell culture are described herein. More particularly, in certain embodiments, a process is described for purifying VSV from cell culture fluid of a mammalian cell culture infected with VSV, the process comprising: clarifying the cell culture fluid by low-speed centrifugation and recovering the VSV in the supernatant; filtering the supernatant through a 0.2 to 0.