Abstract: A method of producing propagation-defective Vesicular Stomatitis Virus (VSV) in a cell culture is provided. The method involves introducing a plasmid vector encoding an optimized VSV G gene into a cell; expressing VSV G protein from the optimized VSV G gene; and introducing a propagation-defective VSV into the cell expressing the VSV G protein encoded by the optimized VSV G gene. The method further includes growing the cells in culture; and recovering the propagation-defective VSV from the culture.

Abstract: A method of producing propagation-defective Vesicular Stomatitis Virus (VSV) is provided. The method involves providing a cell that includes an optimized VSV G gene, wherein expression of VSV G protein from the optimized VSV G gene is inducible; and inducing the cell to express VSV G protein from the optimized VSV G gene. The method also involves infecting the induced cell with an attenuated VSV; growing the infected cells in culture; and recovering attenuated VSV from the culture.

Abstract: This invention relates to a method for recombinantly producing, via rescue of mumps virus, a nonsegmented, negative-sense, single-stranded RNA virus, and immunogenic compositions formed therefrom. Additional embodiments relate to methods of producing the mumps virus as an attenuated and/or infectious virus. The recombinant viruses are prepared from cDNA clones, and, accordingly, viruses having defined changes, including nucleotide/polynucleotide deletions, insertions, substitutions and re-arrangements, in the place of the genome are obtained.