摘要:
Purified antigenic proteins are provided which are capable of inducing in a chicken an immune response conferring protection against infection by Eimeria necatrix , Eimeria tenella or Eimeria maxima . One protein, useful for conferring protection against E. tenella and E. necatrix , has been derived from sporocysts of E. tenella . Other proteins, derived from merozoites of E. maxima , are useful for conferring protection against E. maxima . Monoclonal antibodies directed against the antigenic proteins have also been developed which may be used to confer upon a chicken passive immunity against coccidiosis. Further provided are nucleic acid molecules encoding the antigenic proteins as well as expression vectors containing them. Methods for producing the proteins or antigenic polypeptides having amino acid sequences including within these proteins are also provided. Moreover, multi-component vaccines which comprises admixtures of Eimeria antigens or isotopes are disclosed.
摘要:
Purified antigenic proteins are provided which are capable of inducing in a chicken an immune response conferring protection against infection by Eimeria necatrix and/or Eimeria tenella. One protein, useful for conferring protection against E. tenella and E. necatrix, has been derived from sporocysts of E. necatrix. Monoclonal antibodies directed against the antigenic proteins have also been developed which may be used to confer upon a chicken passive immunity against coccidiosis. Further provided are nucleic acid molecules encoding the antigenic proteins as well as expression vectors containing them. Methods for producing the proteins or antigenic polypeptides having amino acid sequences included within these proteins are also provided.
摘要:
Purified antigenic proteins are provided which are capable of inducing in a chicken an immune response conferring protection against infection by Eimeria necatrix , Eimeria tenella or Eimeria maxima . One protein, useful for conferring protection against E. tenella and E. necatrix , has been derived from sporocysts of E. tenella . Other proteins, derived from merozoites of E. maxima , are useful for conferring protection against E. maxima . Monoclonal antibodies directed against the antigenic proteins have also been developed which may be used to confer upon a chicken passive immunity against coccidiosis. Further provided are nucleic acid molecules encoding the antigenic proteins as well as expression vectors containing them. Methods for producing the proteins or antigenic polypeptides having amino acid sequences including within these proteins are also provided. Moreover, multi-component vaccines which comprises admixtures of Eimeria antigens or isotopes are disclosed.
摘要:
Purified antigenic proteins are provided which are capable of inducing in a chicken an immune response conferring protection against infection by Eimeria necatrix and/or Eimeria tenella. One protein, useful for conferring protection against E. tenella and E. necatrix, has been derived from sporocysts of E. necatrix. Monoclonal antibodies directed against the antigenic proteins have also been developed which may be used to confer upon a chicken passive immunity against coccidiosis. Further provided are nucleic acid molecules encoding the antigenic proteins as well as expression vectors containing them. Methods for producing the proteins or antigenic polypeptides having amino acid sequences included within these proteins are also provided.
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