The invention discloses a recombinant H7N9 subtype
avian influenza virus-like particle, and a preparation method and application thereof. Recombinant baculoviruses for expressing HA
protein, NA
protein and M1
protein of an H7N9
highly pathogenic avian influenza virus are respectively constructed on the basis of a
recombinant baculovirus insect cell culture
system. The three recombinant baculovirusstrains are used for co-infecting suspended
insect cells, so that the H7N9 subtype
avian influenza virus-like particle capable of being self-assembled in the cells can be obtained. After the concentration and purification with
cane sugar with different gradient concentrations through an
ultrafiltration tube, the H7N9 subtype avian influenza
virus-like particle is mixed and emulsified with an
adjuvant to prepare a vaccine. When a chicken is immunized by the prepared vaccine, the body can be induced to generate a
specific antibody; and the advantages of high
immunogenicity, good safety, high hereditary stability and the like are realized. After the
attack by a
lethal dose of H7N9 subtype
highly pathogenic avian influenza viruses, the complete clinical protection can be provided, and
virus expelling of the chicken is obviously inhibited. The invention provides a novel method for preventing H7N9 subtype avian influenza
virus infection, and also lays a foundation for the development of a novel
influenza virus vaccine.