Method for Plasmid DNA-Based Rescue of AHSV

Plasmid DNA-based Rescue of Orbiviruses (African Horse Sickness) refers to a reverse genetics approach that enables scientists to generate infectious orbiviruses entirely from cloned DNA. In this system, the segmented RNA genome of the African horse sickness virus (AHSV), a member of the Reoviridae family, is first converted into complementary DNA (cDNA) and inserted into plasmids. These plasmids are then introduced into suitable host cells, where the viral RNA segments and proteins are expressed in a coordinated manner, leading to the assembly of fully functional virus particles.

This technology is significant because it allows precise manipulation of the viral genome, making it possible to study gene function, virulence, and host interactions in a controlled way. It also provides a powerful platform for developing safer and more targeted vaccines, including attenuated or recombinant strains, without the need to handle large quantities of live virus initially. In the context of African horse sickness, a severe and often fatal disease affecting horses, this approach supports improved vaccine design, outbreak preparedness, and a deeper understanding of orbivirus biology.