Abstract
Summary
1. Rabbits heavily immunized with Treponema microdentium develop high titers of both complement-fixing (CF) and hemagglutinating (HA) antibody. 2. Of 77 human sera, 5% had low titers of CF anti-body and 12% had low titers of HA antibody to T. microdentium. 3. The patterns of antibody response in both the rabbits and patients indicate that the CF and HA antibodies are produced in response to different antigens of this spirochete.
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