Antigenic proteins and vaccines containing them and protective antibodies directed to them for prevention of coccidiosis caused by Eimeria tenella and Eimeria necatrix
    10.
    发明公开
    Antigenic proteins and vaccines containing them and protective antibodies directed to them for prevention of coccidiosis caused by Eimeria tenella and Eimeria necatrix 失效
    抗生素蛋白质和包含它们的疫苗和保护性抗体,用于预防艾米利亚·泰尼拉和艾美豹NECATRIX引起的预防结核病

    公开(公告)号:EP0164176A3

    公开(公告)日:1987-05-27

    申请号:EP85200889

    申请日:1985-06-05

    摘要: A purified antigenic protein has been obtained which is capable of inducing in a chicken an immune response conferring protection against infection by Eimeria tenella or Eimeria necatrix. The protein has a molecular weight of about 25,000 and is composed of two polypeptides joined by a disulfide bond. The two polypeptide subunits have molecular weights of about 17,000 and about 8,000, respectively. The gene encoding the protein has been sequenced and the amino acid sequence of the protein deduced therefrom and by direct peptide sequencing. The protein and antigenic polypeptides having an amino acid sequence included within the protein may be incorporated into a vaccine for conferring upon a chicken active immunity against infection by E. tenella and E. necatrix. A hybridoma cell line (ATCC No. HB8561) has been developed which produces a monoclonal antibody designated Ptn 7.2A4/4. This antibody may be used to confer upon a chicken specific passive protection against infection by E. tenella and E. necatrix. The antibody may also be used to obtain the purified protein antigen and the 11,500 and 6,500 dalton polypeptide fragments thereof. Finally, an anti-idiotype antibody to the Ptn. 7.2A4/4 monoclonal antibody may be prepared and used to confer upon a chicken active immunity against E. tenella and E. necatrix infection. Legend * Initial amino acid of 17.000 dalton peptide ** Pinal amino acid of 17.000 dalton peptide + Initial amino acid of 8,000 dalton peptide ++ Pinal amino acid of 8,000 dalton peptide Key to ambiguous bases 3= Probably C 5 Probably A 7 Maybe C 8 Maybe T 0 Maybe C Y C or T M = C or G