Abstract
Influenza viruses are considered prominent pathogens of humans and animals that are extensively investigated because of public health importance. Plasmid-based reverse genetics is a fundamental tool that facilitates the generation of genetically modified viruses from a cDNA copy. The ability to rescue viruses enables researchers to understand different biological characteristics including IV replication, pathogenesis, and transmission. Furthermore, understanding the biology and ability to manipulate different aspects of the virus can aid in providing a better understanding of the mechanisms of antiviral resistance and development of alternative vaccination strategies. This chapter describes the process of cloning cDNA copies of IAV and IBV RNA segments into a swine polymerase-driven reverse genetics plasmid vector, successful generation of recombinant IVs in swine cells, and propagation of virus in cells or eggs. The swine polymerase reverse genetics system was previously shown to be efficient for de novo rescue of human-, swine-, and avian-origin IAVs and IBV in swine and human origin cell lines utilizing the same protocols discussed in this chapter.
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