Studies of the Incidence of T. Pallidum Immobilizing Antibody in Rabbit Immune Sera against Various Types of Micro-organisms and Viruses

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Abstract
The sera of 539 rabbits previously immunized to a wide variety of bacteria, viruses and other microorganisms, were tested for Treponema pallidum im-mobilizing (TPI) antibody. TPI tests were nonreactive in every serum. Microorganisms chosen were selected because they are common causes of infectious diseases in the temperate zone. The authors sug-gest that other treponemal tests, which react to different antibodies, be studied in a similar way.