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 AND
Max Theiler
From the Department of Tropical Medicine, Harvard Medical School, Boston, Massachusetts
1. Guinea pigs actively immunized against the Boston strainof L. icterohaemorrhagiae are immune against Type A of the Akiyamistrain of leptospira.
2. Guinea pigs actively immunized againstType A of the Akiyamistrain of leptospira are immune againstthe Boston strain ofL. icterohaemorrhagiae.
3. These twostrains are indistinguishable by the cross immunitytests.