The Relationship of Leptospira Icterohae-Morrhagiae and the Akiyami Type a Strain of Leptospira as Determined by Cross Immunization Experiments in Guinea Pigs

K. Yang Department of Tropical Medicine, Harvard Medical School, Boston, Massachusetts

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Max Theiler Department of Tropical Medicine, Harvard Medical School, Boston, Massachusetts

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Summary

  1. 1. Guinea pigs actively immunized against the Boston strain of L. icterohaemorrhagiae are immune against Type A of the Akiyami strain of leptospira.
  2. 2. Guinea pigs actively immunized against Type A of the Akiyami strain of leptospira are immune against the Boston strain of L. icterohaemorrhagiae.
  3. 3. These two strains are indistinguishable by the cross immunity tests.

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