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Abstract ▼ AI-Helper

The antigenecity of somatic substances of S. pullorum standard strain and variant strain extracted byheat treatment, acid treatment and their modification, ammonium sulfate saturation (60 per cent), trypsin digestion was tested by indirest hemagglutination test and precipitation test and following r...

The antigenecity of somatic substances of S. pullorum standard strain and variant strain extracted byheat treatment, acid treatment and their modification, ammonium sulfate saturation (60 per cent), trypsin digestion was tested by indirest hemagglutination test and precipitation test and following results were optained. 1. Teatment at $100^{\circ}C$ for an hour of the bacteria could extract the antigen of S. pullorum standard strain and variant strain which was demonstrable by hemagglutination reaction with the human a group and chicken red blood cell. 2. Trypsin digestion was more enhanced its antigenecity in acid extracted antigen of S. pullorum variant strain compare with the S. pullorum standard strain. 3. The extracted antigenic substances of S. pullorum standard strain existed chiefly in the elicited fraction of precipitate at the treatment of ammonium sulfate saturation and after trypsin digestion, its antigenecity was demonstrated by hemagglutination. 4. At the treatment of ammonium sulfate treatment, did not occur the precipicate in acid extracted antigens of S. pullorum variant strain, however, the heal extracted antigen, positive reactions were obtained in both of the precipitate and supernatant fraction of the S. pullorum variant strain by hemagglutination reaction. After trypsin digestion, these fraction also exhibited positive reactions. 5. Precipitation test also tested dub could not detect in any soft of the antigens.