Mosquito densonucleosis viruses (MDVs) have the potential for use as biocontrol agents. To facilitate densovirus production, the Aedes albopictus mosquito cell line C6/36 was adapted to two commercially available serum-free protein-free media (SFPFM), Sf-900 II and Drosophila-SFM. Cells adapted more slowly to growth in Sf-900 II medium, but once adapted, they grew more rapidly and appeared healthier than cells growing in Drosophila-SFM. Cells that were adapted to growth in each of these SFPFM were tested for their ability to be transfected and infected with MDVs. The Sf-900 II–adapted cell line survived transfection and showed infection rates comparable with cells growing in L15 supplemented with 10% fetal bovine serum. Cells adapted to Drosophila-SFM were less infectable and did not survive transfection. Cells adapted to each of these SFPFM were adapted to growth in spinner flasks. Cells in Sf-900 II grew substantially better in spinner flasks than cells in Drosophila-SFM media. Cells grown in Sf-900 II could be frozen and, when thawed, could support the production of densonucleosis viruses in spinner flasks.
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Vol. 40 • No. 3