FIELD: medicine.
SUBSTANCE: invention relates to field of veterinary and deals with mutant virus of bull diarrhea. Essence of invention includes virus of bull diarrhea, containing at least one amino acid mutation of helicase domaine, where mutation in domain NS3 results in loss of recognition by monoclonal antibody, generated against wild type of NS3, but were virus RNA replication and generation of infectious virus are preserved. Second version includes virus of bull diarrhea containing at least one mutation in helicase domain, where mutation is in helicase domain in IGR loop and/or in KHR loop and/or in SES loop.
EFFECT: advantage of invention lies in obtaining mutant virus of bull diarrhea, where virus RNA replication and generation of infectious virus are preserved.
21 cl, 10 ex, 7 tbl, 5 dwg
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