Isolation and Purification of Viruses from Infected Insect Bodies

Take virus-infected insect bodies suspended in a buffer containing a chelating agent.

Homogenize to break the insect tissues and release intracellular components, including viral particles and reactive metal ions.

The chelating agent binds to metal ions, preventing reactive oxygen species formation and protecting viral particles from oxidative damage.

Ultracentrifuge to pellet the virus and insoluble debris, then discard the supernatant.

Add a buffer containing salts and detergent, then resuspend the pellet by repeated pipetting. The detergent dissolves the lipid-rich debris to release the associated virus particles.

Centrifuge to pellet the insoluble debris. Collect the supernatant containing viral particles.

Filter the supernatant to remove residual debris and collect the virus-containing filtrate.

Dialyze the filtrate in water at a low temperature to remove the excess detergent and buffer salts.

Replace the water periodically until the viral particles precipitate. The virus is ready for further use.

Homogenize whole bodies of virus-positive H. vitripennis in phosphate buffer with 0.02% DETCA by vortexing for approximately ten second intervals until there are no more large clumps of tissu