title: Cross-protection and antigen expression by chicken embryo-grown Pasteurella multocida in chickens.
abstract: The growth of Pasteurella multocida strain X-73 (serotype 1) and P-1059 (serotype 3) in vivo instead of in vitro resulted in the expression of additional antigens, as revealed by SDS-PAGE profile and western blotting of the outer membrane detergent-insoluble fraction (DIF-OM). Minor protein bands ranging from 58-138 kDa were expressed by both strains; major bands ranging from 35-64 and 35-43 kDa were expressed by X-73 and P-1059, respectively. Antigens at 35-39 kDa were dense and dominant. Treatment of DIF-OM from both strains with sodium periodate and proteinase K, but not with trypsin, reduced ELISA reactivity; this suggested that DIF-OM was composed of glycoprotein. Western blotting with heterologous antisera demonstrated antigenic cross-reactivity between strains X-73 and P-1059 grown in vivo. Inactivated vaccine prepared from X-73 grown in vivo protected chickens against challenge with X-73, P-1059 and strain P-1662 (serotype 4); a similar vaccine prepared from in-vitro culture, however, protected only against the homologous serotype. Moreover, antiserum against X-73 grown in vivo but not against the same strain grown in vitro gave considerable passive protection against challenge with the heterologous strains P-1059 and P-1662.
authors.affiliation: Department of Poultry Diseases, Assiut University, Assiut, Egypt.
authors.forename: R S
authors.initials: RS
authors.lastname: Ibrahim
authors.forename: T
authors.initials: T
authors.lastname: Sawada
authors.forename: M
authors.initials: M
authors.lastname: Shahata
authors.forename: A
authors.initials: A
authors.lastname: Ibrahim
mesh_terms: D000818:Animals; D000907:Antibodies, Bacterial / Q000276:immunology; D000942:Antigens, Bacterial / Q000276:immunology*; D001425:Bacterial Outer Membrane Proteins / Q000276:immunology; D001431:Bacteriological Techniques; D015153:Blotting, Western; D002642:Chick Embryo; D002645:Chickens; D003429:Cross Reactions; D004797:Enzyme-Linked Immunosorbent Assay; D007116:Immunization, Passive; D010326:Pasteurella Infections / Q000517:prevention & control / Q000662:veterinary*; D016979:Pasteurella multocida / Q000276:immunology*; D011201:Poultry Diseases / Q000517:prevention & control*; D014611:Vaccination
chemical_list: D000907:Antibodies, Bacterial; D000942:Antigens, Bacterial; D001425:Bacterial Outer Membrane Proteins