title: Characterization of the major outer membrane antigens of Treponema hyodysenteriae.
abstract: Outer membrane extracts of Treponema hyodysenteriae were used to evaluate the antibody responses in immunized or convalescent pigs. Western blot (immunoblot) analysis identified antibodies in sera reactive with 14- to 19-kilodalton (kDa) antigens. Reactivity against these antigens could be removed only by absorption of sera with butanol-water-extracted endotoxin from the homologous strain of T. hyodysenteriae. Treatment of the outer membrane extracts with 0.1 M sodium meta-periodate, but not with proteinase K, abolished reactivity with both outer membrane and endotoxin antigens (14 and 19 kDa). These results indicate that swine vaccinated with the outer membrane extract of T. hyodysenteriae develop antibody responses to outer membrane antigens qualitatively similar to those of swine convalescing from active infection, especially antibodies against low-molecular-mass antigens. The nature of the 14- to 19-kDa antigens appears consistent with that of treponemal endotoxin and lipopolysaccharide.
authors: Veterinary Medical Research Institute, Iowa State University, Ames 50011.
authors: M J
authors: MJ
authors: Wannemuehler
authors: R D
authors: RD
authors: Hubbard
authors: J M
authors: JM
authors: Greer
mesh_terms: D000818:Animals; D000907:Antibodies, Bacterial / Q000276:immunology; D000942:Antigens, Bacterial / Q000276:immunology*; D001425:Bacterial Outer Membrane Proteins / Q000276:immunology*; D015153:Blotting, Western; D004591:Electrophoresis, Polyacrylamide Gel; D004731:Endotoxins / Q000276:immunology; D000939:Epitopes; D008070:Lipopolysaccharides / Q000276:immunology; D008970:Molecular Weight; D013552:Swine; D014208:Treponema / Q000276:immunology*; D014211:Treponemal Infections / Q000276:immunology / Q000517:prevention & control; D014611:Vaccination
chemical_list: D000907:Antibodies, Bacterial; D000942:Antigens, Bacterial; D001425:Bacterial Outer Membrane Proteins; D004731:Endotoxins; D000939:Epitopes; D008070:Lipopolysaccharides