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  • Title: Precipitating antibody against protease of Corynebacterium pyogenes in pigs.
    Author: Takeuchi S, Miyao S, Azuma R, Suto T.
    Journal: Natl Inst Anim Health Q (Tokyo); 1977; 17(1):10-5. PubMed ID: 404574.
    Abstract:
    Antibody in sera from pigs carrying an abscess associated with Corynebacterium pyogenes and healthy pigs was examined by the agar gel diffusion test. In the test, the concentrated culture fluid containing the protease of C. pyogenes was used as antigen. As a result, precipitating antibody was demonstrated in sera from 25 of 30 abscessed pigs and a few of the healthy pigs. When the relationship between precipitating antibody and protease was examined by the immunoelectrophoresis and gel filtration of the concentrated culture fluid, the antibody was shown in the same position as the protease. From the result, it was clear that the precipitating antibody was against the protease of C. pyogenes. All the proteases produced by 27 strains of C. pyogenes of porcine and bovine origin were serologically identical with one another. They were, however, serologically different from those of Staphylococcus aureus, Bacillus cereus, and B. subtilis. In the inhibition test, the proteolytic activity of C. pyogenes was inhibited by the serum of the abscessed pig. It was also inhibited by healthy pig serum. From the results, it seems that the determination of precipitating antibody may be useful for the diagnosis of C. pyogenes infection.
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