Genome analysis and pathogenicity of reticuloendotheliosis virus isolated from a contaminated vaccine seed against infectious bursal disease virus: first report in China

Abstract excerpt

Specific-pathogen-free (SPF) chickens were inoculated with the virus seed of an infectious bursal disease virus (IBDV)-attenuated vaccine, and positive reticuloendotheliosis virus (REV) antibody levels were subsequently detected in the chicken sera, indicating potential REV contamination of the vaccine. After neutralization with IBDV-positive blood serum, the vaccine was inoculated into DF-1 cells for REV...

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