Abstract
Summary
A more sensitive Donath-Land-steiner test did not detect the hemolysin of paroxysmal cold hemoglobinuria in sera of patients with syphilis more often than tests used in other surveys. Although related to syphilitic infection, PCH antibody was shown to differ from treponemal immobilizing antibody, the specific antibody of this infection. The mechanism of production of PCH antibody remains unexplained.
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