Eimeria poisoning SAG7 antigen subunit vaccine as well as preparation method and application thereof

The invention provides an eimeria necatrix SAG7 antigen subunit vaccine as well as a preparation method and application of the eimeria necatrix SAG7 antigen subunit vaccine. The invention also provides a nucleic acid molecule, wherein the nucleic acid molecule codes the eimeria poisoning toxicant SAG7 protein; the nucleic acid molecule comprises a nucleotide sequence as shown in SEQ ID NO: 1. The subunit vaccine is prepared by taking the eimeria necatrix SAG7 as an antigen, the SAG7 protein has good immunogenicity, and the SAG7 protein subunit vaccine has relatively strong activity in the aspect of resisting eimeria necatrix oocyst infection. Compared with a virulent or attenuated live vaccine, the genetic engineering subunit vaccine not only can induce a good antibody reaction and protect poultry from resisting Eimeria oocyst infection, but also is high in safety and good in stability, and solves the problem that the live vaccine has a virus scattering risk. 本发明提供了一种毒害艾美耳球虫SAG7抗原亚单位疫苗及其制备方法和应用。本发明还提供了一种核酸分子，