Treponema pallidum hemagglutination test
a highly sensitive and specific test for the serologic diagnosis of syphilis; tanned sheep red blood cells are coated with the antigen of T. pallidum and, after absorption of nonspecific patient serum antibody, a positive reaction with tanned sheep red blood cells and patient serum indicates the presence of specific antibody for T. pallidum in patient serum.
Synonym(s): TPHA test
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