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  • Title: Production and characterization of monoclonal antibodies specific for Leptospira borgpetersenii serovar hardjo type hardjobovis and Leptospira interrogans serovar hardjo type hardjoprajitno.
    Author: Surujballi O, Howlett C, Henning D.
    Journal: Can J Vet Res; 1999 Jan; 63(1):62-8. PubMed ID: 9918336.
    Abstract:
    Murine monoclonal antibodies were produced by immunizing BALB/c mice with a killed whole-cell antigen prepared from Leptospira borgpetersenii serovar hardjo type hardjobovis. Six of these antibodies recognized epitopes on the homologous antigen and on whole-cell antigen prepared from Leptospira interrogans serovar hardjo type hardjoprajitno. These antibodies did not cross-react with whole-cell antigens prepared from L. borgpetersenii serovar sejroe, 10 other pathogenic Leptospira serovars, or the saprophytic Leptospira biflexa serovar patoc. Three other monoclonal antibodies reacted with antigens prepared from the 2 hardjo serovars and serovar sejroe but not with antigens from the 10 other pathogenic serovars, or serovar patoc. The epitopes recognized by all of the hardjo-specific antibodies and 2 of the 3 hardjo/sejroe-specific antibodies were susceptible to sodium meta-periodate oxidation. All of the antibodies were characterized by Western blots with the hardjobovis whole-cell antigen. Each of the 9 monoclonal antibodies was inhibited from binding to the hardjobovis antigen by bovine sera which were obtained from cattle experimentally infected with hardjobovis and from field cattle, with anti-serovar hardjo microscopic agglutination test antibody titres ranging from 100 to 12800. Some of these antibodies may be suitable for incorporation into competitive enzyme immunoassays for the specific detection of antibodies to either of the hardjo serovars.
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