title: Role of immune responses to a GroEL heat shock protein in preventing brucellosis in mice vaccinated with Brucella abortus strain RB51.
abstract: Resistance to infection with virulent Brucella abortus strain 2308 and antibody and lymphocyte proliferative responses to a recombinant 60 kDa B. abortus GroEL heat shock protein were measured in mice vaccinated with attenuated B. abortus strain RB51. Mice at 12-20 weeks after vaccination with 5 x 10(8) colony forming units (CFU) of strain RB51 had increased resistance to infection with strain 2308 and increased antibody and lymphocyte proliferative responses to GroEL following challenge infection with 2308. However, these mice at 12-20 weeks after vaccination did not have greater resistance to infection than mice vaccinated with 5 x 10(6) CFU of strain RB51, which had no increased antibody or lymphocyte proliferative response to GroEL. These results indicate that mice vaccinated with strain RB51 can have antibody and cell-mediated immune responses to GroEL during infection with virulent strain 2308, although neither response appeared to have an essential role in vaccine-induced immunity to brucellosis.
authors.affiliation: Brucellosis Research Unit, National Animal Disease Center, USDA, Ames, Iowa 50010, USA.
authors.forename: M G
authors.initials: MG
authors.lastname: Stevens
authors.forename: S C
authors.initials: SC
authors.lastname: Olsen
authors.forename: G W
authors.initials: GW
authors.lastname: Pugh
authors.forename: J E
authors.initials: JE
authors.lastname: Mayfield
mesh_terms: D000818:Animals; D000907:Antibodies, Bacterial / Q000096:biosynthesis; D002003:Brucella abortus / Q000187:drug effects / Q000276:immunology* / Q000472:pathogenicity; D002006:Brucellosis / Q000276:immunology* / Q000517:prevention & control*; D018834:Chaperonin 60 / Q000235:genetics / Q000276:immunology*; D015169:Colony Count, Microbial; D005260:Female; D066298:In Vitro Techniques; D008213:Lymphocyte Activation; D051379:Mice; D008807:Mice, Inbred BALB C; D011994:Recombinant Proteins / Q000235:genetics / Q000276:immunology; D014611:Vaccination; D014774:Virulence / Q000276:immunology
chemical_list: D000907:Antibodies, Bacterial; D018834:Chaperonin 60; D011994:Recombinant Proteins